taxonID	type	description	language	source
FC3D2479FFE5FF95F6D3FCB7FD42FC3E.taxon	description	Figs. 1 – 8, 38 Description. Body small for family, narrow (Fig. 1); length less than 5.0 mm. Color: Ground color brown with abdominal mediotergites lighter; pruinose markings present on dorsal and lateral thorax, and on each laterotergite; ventral surface darker; legs and antennae brown. Structural characters: Head relatively long, 0.55 times the length of the thorax and abdomen combined; anteocular portion slightly shorter than postocular portion, ratio 1.0 / 1.3; eyes small, width of an eye as viewed from above less than width of interocular space; labium long, reaching onto prosternum between anterior margins of fore acetabula; antennae long, about 0.60 times total body length, slender, antennomere II only slightly longer than antennomere I, antennomere III slightly over 3 times as long as antennomere II, antennomere IV almost exactly 3 times as long as II, antennomere I stouter than antennomeres II – IV, antennomere IV slightly inflated apically; posterior pair of cephalic trichobothria set on low tubercles, length exceeding the distance between these tubercles and anterior margin of pronotum. Thorax widened posteriorly; pronotal lobe short, extending posteriorly over mesonotum, metanotum exposed, without any trace of wing pads. Legs slender, but not threadlike, total length of hind leg equal to length of body; fore-to-middle versus middleto-hind coxal spacing subequal, ratio 1.00 / 1.20; pretarsus with both dorsal and ventral arcuate arolia, parempodia long, setae-like. Abdomen with mediotergites II – VII quadrate, equilateral or nearly so; male abdominal sternum VII unmodified, lacking paired sclerotized processes or patches of bristle-like setae.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE5FF95F6D3FCB7FD42FC3E.taxon	type_taxon	Type-species. Marquesametra hivaoa n. sp.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE5FF95F6D3FCB7FD42FC3E.taxon	etymology	Etymology. The generic name Marquesametra is derived from the island group, the Marquesas, to which it is endemic, and metra, measurer. Gender feminine.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE5FF95F6D3FCB7FD42FC3E.taxon	distribution	Distribution. Marquesas Islands, Hiva Oa.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE5FF95F6D3FCB7FD42FC3E.taxon	discussion	Discussion. Marquesametra is a wingless, terrestrial hydrometrid occurring in the upland cloud forests of Hiva Oa island, in the Marquesas group. Although at first glance when seen in the field it resembles a minute Hydrometra, it clearly stands apart from that genus by its much shorter head capsule, with the anteocular portion of the head being shorter than the postocular portion (1.00 / 1.15), versus the character state in Hydrometra where the anteocular head is 2 – 3 times longer than the postocular portion (see J. Polhemus & D. Polhemus 1995 c, Fig. 2). In addition, the abdomen is proportionally shorter and broader, with the abdominal mediotergites of Marquesametra being square and equilateral, versus the character state seen in Hydrometra, where these tergites take the form of elongate rectangles with their lengths being over 4 times their widths (see J. Polhemus & D. Polhemus 1995 c, Fig. 4). The spacing between the fore-versus-middle and middle-versus-hind coxae in Marquesamatra is nearly subequal, being 1.0 / 1.2, whereas in Hydrometra the hind coxae are far more posteriorly displaced, with this ratio usually on the order of 1.0 / 2.0. Finally, the legs of Marquesametra are also relatively shorter and stouter in relation to the body, with the total length of the hind leg being merely equal to the length of the body, versus clearly exceeding the body length in Hydrometra. This genus shows certain similarities to the subsequently described Prohydrometra from the Society Islands, but in that genus the fore-middle versus middle-hind coxal spacing ratio is slightly more unequal, being greater than 1.4 (compare Figs. 3, 9, 13). The abdomen in Prohydrometra is also slightly more elongate, with the abdominal mediotergites being slightly rectangular, and longer than wide. The male abdominal sternum VII in Prohydrometra also exhibits consistent modifications in the form of paired processes or setal patches, which are absent in Marquesametra and the other two endemic Marquesan genera. Finally, in all species of Prohydrometra, antennomere III is extremely prolonged, being 5 times the length of antennomere II (Fig. 11), versus only about 3 times as long in Marquesametra (Fig. 1). The two genera also inhabit different volcanic archipelagoes separated by an ancient water gap of over 1400 km, and as such are markedly allopatric. In comparison to the other two endemic genera of Hydrometridae found in the Marquesas, Dolichocephalometra and Chaetometra, the differing form of the head capsules will easily separate these two taxa from Marquesametra (compare Figs. 1, 32, 37). In Dolichocephalometra the head is very elongate, being nearly as long as the body and having the eyes highly reduced, while the head capsule in Chaetometra is much shorter and bears long, erect pilosity that also occurs on the remainder of the body and the legs. All of the genera discussed above do share certain common character states, including: 1) the posterior pair of cephalic trichobothria set on low tubercles; 2) pretarsus with both dorsal and ventral arcuate arolia, and long, setae-like parempodia, 3) an absence of modifications to male abdominal sternum VII; and 4) a simple cuticular microstructure consisting of short, slightly curling setae covering the body, with interspersed longer, dark, bristlelike setae, but with an absence of dark denticles or plates. These character states are all considered plesiomorphic within Hydrometridae as a whole (Andersen 1982 a).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE4FF91F6D3FBAFFBA2FC76.taxon	description	Figs. 1 – 8, 38 Micropterous male. Length 3.90 – 4.30, width 0.40 – 0.50. Color: Ground color brown; abdominal mediotergites light brown, matte. Head tinged with blackish ventrally, and dorsally anterad of eyes. Thorax dorsally with narrow median longitudinal frosted stripe, pronotum laterally with narrow frosted longitudinal stripe; each laterotergite with frosted area anteriorly. Venter of thorax and abdomen dark. Legs light brown to brown, darker distally, antennae brown to dark brown; coxae and trochanters mostly light brown, similar to bases of femora. Structural characters: Head (Fig. 2) relatively long (1.55), widest at antennal tubercles (0.32); set with bristly setae beneath; gular lobe large, rounded; labium reaching well caudad of eyes, onto prosternum; ratio of anteocular / postocular portions: 0.47 / 0.54; interocular space / width of an eye: 0.11 / 0.05; anteclypeus small, broadly rounded anteriorly (Fig. 1). Antennal formula I: II: III: IV; 0.23: 0.29: 1.04: 0.86. Entire body covered with very small shallow frosted foveae. Pronotum length 0.61; remainder of thorax 0.25 (to lateral suture behind metacetabula); abdomen length 1.87. Wing pads, if present, very small, not visible, hidden under pronotum. Thoracic and abdominal sterna with short bristly setae, about equally dense on all segments. Distance between anterior and middle coxae (measured between centers) 0.35; between middle and hind coxae 0.42 (Fig. 3); acetabula without pits. Venter without black denticles. Legs with proportions as follows: femur, tibia, tarsomere I, tarsomere II, tarsomere III of fore-leg, 1.15: 1.30: 0.05: 0.16: 0.11; of middle-leg, 1.19: 1.37: 0.05: 0.18: 0.14; of hind-leg, 1.62: 2.23: 0.05: 0.23: 0.18. Abdomen with first segment short, transverse, clearly delineated by a suture posteriorly. Male abdominal terminalia as shown in Fig. 4, segment VIII cylindrical, unmodified, without distal process. Sternum VII without modifications. Micropterous female. Length 4.61, width across abdomen 0.83. Similar in most respects to male, but abdomen broader, deeper, mediotergite VIII distally truncate, without distal process; margins of laterotergites lacking setae. Brachypterous and macropterous forms. Unknown.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE4FF91F6D3FBAFFBA2FC76.taxon	materials_examined	Type material examined (all micropterous). Holotype, male: FRENCH POLYNESIA, Marquesas Islands, Hiva Oa, Mt. Temetiu, high point on ridge to S. of trail crest, 1190 m, 9 ° 48 ' 02 " S, 139 ° 04 ' 41 " W, 14 August 2001, ex. pyrethrin fogging of thick moss on Metrosideros collina, CL 6031 b, D. A. Polhemus & R. Englund (BPBM). Paratypes: FRENCH POLYNESIA, Marquesas Islands, Hiva Oa: 6 males, 2 females, same data as holotype (USNM, BPBM); 1 male, 1 female, Temetieu Ridge, pyrethrin fog of thick moss on large Metrosideros collina tree at ridge crest, 1112 m, 9 ° 47 ' 54 " S, 139 ° 04 ' 44 " W, 26 October 1999, CL 6016, D. A. Polhemus, J. T. Polhemus, R. Englund and S. Jordan (USNM); 4 males, Temetieu Ridge, pyrethrin fog of thick moss on Metrosideros collina trees near camp on ridge crest, 1095 m, 9 ° 47 ' 56 " S, 139 ° 04 ' 45 " W, 14 August 2001, CL 6031 a, D. A. Polhemus, R. Englund and S. Jordan (USNM, BPBM).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE4FF91F6D3FBAFFBA2FC76.taxon	distribution	Distribution. Known only from the island of Hiva Oa in the Marquesas Islands (Fig. 38).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE4FF91F6D3FBAFFBA2FC76.taxon	etymology	Etymology. The species name is a noun in apposition, and refers to the Hiva Oa island type-locality.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE4FF91F6D3FBAFFBA2FC76.taxon	discussion	Discussion. Marquesametra hivaoa may be separated from the the other two endemic species of Hydrometridae previously described from the Marquesas by the characters provided in the key to genera, and covered in the previous discussion under the new genus description. As noted there, in certain respects Marquesametra hivaoa resembles species of Prohydrometra occurring on the Society Islands, suggesting that these species may have arisen from a common lineage that colonized the insular Pacific at some time in the past, but they differ in several important character states related to the form of the antennae, coxal spacing, and ventral abdominal structure. Ecological notes. The type-material of M. hivaoa was taken from the summit ridge of Mt. Temetiu, the highest mountain on the island of Hiva Oa. This area lacked any aquatic habitats, being covered with wet cloud forest vegetation (Figs. 5 – 8) consisting of large, isolated, moss-covered Metrosideros collina trees lying in the lee of the ridge crest, but not forming a closed canopy. The intervening understory vegetation was dense, consisting largely of the climbing pandanus, Freycinetia arborea Gaudich., and many species of ferns, including scattered tree ferns. Damage from feral pigs was evident here, and had reportedly become more pronounced over the 10 years previous to our surveys, with grasses beginning to invade certain open areas created by their disturbance. Individuals of M. hivaoa were obtained here by applying a light pyrethrin fog to the dense pads of moss covering the Metrosideros trunks and branches, with sheets placed below to catch the dropping insects. By contrast, no examples of M. hivaoa were taken by beating or sweeping, demonstrating how this species can be easily missed by such conventional collecting techniques. Alhough Chaetometra robusta (Hungerford, 1939) was described from the same ridge on Hiva Oa island, and the two taxa would thus appear to be potentially syntopic, it would seem that they must occupy different habitats, since multiple days of collecting in this area by four entomologists using a variety of techniques produced 15 specimens of Marquesametra, but no specimens of Chaetometra.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE0FF9FF6D3FC66FB02FDEE.taxon	description	Figs. 9 – 29 Description. Body small for family, narrow (see J. Polhemus & D. Polhemus 1995 a, Fig 1); body without black spicules; body lengths 4.15 – 7.20. Color: Ground blackish-brown to yellowish-brown; legs slightly paler; abdominal laterotergites often with faintly suggested paler areas on anterior halves. Structural characters: Head relatively long, anteocular portion slightly longer than postocular portion (Figs. 10, 12), ratio varying from 1.33 / 1.00 to 1.59 / 1.00; eyes small, with dorsal eye width subequal to or less than width of interocular space (Figs. 10, 12); labium long, reaching onto prosternum; antennae long, combined length equal to nearly that of body, slender, antennomere II longer than antennomere I, antennomere III over 5 times as long as antennomere II (Fig. 11), antennomere IV about 3 times as long as antennomere II. Thorax widened posteriorly; pronotal lobe short, extending posteriorly over mesonotum, metanotum exposed, without any trace of wing pads; acetabula without pits. Legs slender, moderately long, combined lengths of hind leg segments about 1.3 times as long as body; foreto-middle versus middle-to-hind coxal spacing unequal, ratio varying from 1.00 / 1.22 to 1.00 / 1.90 (Figs. 9, 13); pretarsus with both dorsal and ventral arcuate arolia, parempodia long, setae-like. Abdomen with segment I clearly delineated, short, rectangular; abdominal mediotergites II – VII rectangular, slightly longer than wide, length to width ratio about 1.1 / 1.0; female abdominal sternum VII and tergum VIII without caudal processes; male abdominal sternum VII bearing paired sclerotized processes or modified setal patches to either side of longitudinal midline (Figs. 19 – 24).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE0FF9FF6D3FC66FB02FDEE.taxon	type_taxon	Type-species. Hydrometra gagnei J. Polhemus & D. Polhemus, 1995 a.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE0FF9FF6D3FC66FB02FDEE.taxon	etymology	Etymology. The generic name Prohydrometra is derived from pro-, L., before, and Hydrometra, water measurer. Gender feminine.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE0FF9FF6D3FC66FB02FDEE.taxon	distribution	Distribution. French Polynesia, Society Islands (Moorea, Raiatea, Tahiti).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE0FF9FF6D3FC66FB02FDEE.taxon	discussion	Discussion. Prohydrometra possesses a set of character states that are intermediate between the putatively plesiomorphic conditions seen in Marquesametra, and the more modified states seen in Hydrometra. The abdomen is longer than in Marquesametra, in which the mediotergites are quadrate and equilateral, but shorter than in Hydrometra, with abdominal mediotergites III – VI weakly rectangular, being slightly longer than wide, but not nearly so elongate as in Hydrometra. The hind coxae are slightly more posteriorly displaced to varying degrees compared to the condition seen in Marquesametra, where the spacing is nearly equal (compare Figs. 3, 9, 13), but still far less asymmetrical than the condition seen in Hydrometra. The legs are longer longer than in Marquesametra, with the combined length of the hind leg slightly longer than the body, but shorter and less thread-like than in Hydrometra species. Similar to Marquesametra, but in contrast to Hydrometra, the body lacks both black spicules ventrally, and pits on the acetabula. The posterior pair of cephalic trichobothria is set on low tubercles, similar to Hydrometra species and the three endemic Marquesan genera, and the eyes are somewhat reduced, a character state also prevailing in the endemic Marquesan genera. This suite of characters, as well as those discussed previously under Marquesametra, serve to separate this genus from others in the family. In addition, the members of this genus have a diagnostic antennal morphology, with the combined lengths of the antennomeres being subequal to that of the body, due to a highly elongated antennomere III, which is five times the length of antennomere II (Fig. 11).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEEFF9AF6D3FAC2FC13FCEA.taxon	description	Figs. 12 – 15, 18 Apterous female. Length 5.55, width 0.80. Color. Ground color yellowish-brown, body slightly darker than appendages, abdominal laterotergites with faintly suggested paler areas on anterior halves; legs and antennae uniformly pale yellowish-brown. Structure. Head relatively long (2.00), widest at antenniferous tubercles (0.45); bearing numerous fine, erect, slightly curving setae (Fig. 12); gular lobe large, rounded, covering first two labial articles in lateral view; labium reaching well caudad of eyes, onto middle of prosternum, length 2.15, head with anteocular portion slightly longer than postocular portion, ratio of anteocular / postocular portions: 1.00 / 0.75; interocular space / width of an eye: 0.07 / 0.05; anteclypeus small, broadly rounded anteriorly (Fig. 12). Antennae with antennomere III very elongate, lengths of antennomeres I: II: III: IV = 0.30: 0.35: 2.15: 1.30. Pronotum length 0.75; remainder of thorax 0.50 (to lateral suture behind metacetabula); bearing numerous fine, erect, slightly curving setae. Abdomen length 2.52, bearing numerous short, semi-appressed black setae, these setae shorter and less erect than those on head and thorax; abdominal apex acute (Fig. 14). Wing pads, if present, very small, not visible, hidden under pronotum. Thoracic and abdominal sterna with numerous moderately short, fine, semi-appressed setae, about equally dense on all segments. Coxal spacing unequal (Fig. 13), with hind coxae posteriorly displaced, distance between anterior and middle coxae (measured between closest margins) 0.45; between middle and hind coxae 0.55. Acetabula without pits. Venter without black denticles, ventral suture between thorax and abdomen obscure. Legs with femora thicker than tibiae (Fig. 15); hind tibia very long; proportions of legs as follows: femur, tibia, tarsomere I, tarsomere II, tarsomere III of fore-leg, 1.70: 1.95: 0.05: 0.15: 0.18; of middle-leg, 1.75: 2.10: 0.05: 0.20: 0.15; of hind-leg, 2.30: 3.15: 0.05: 0.20: 0.16. First abdominal segment short, transverse, width / length = 0.35 / 0.15, clearly delineated by a suture posteriorly. Mediotergites II – V nearly quadrate, all subequal in length, slightly longer than wide; abdominal mediotergites VI and VII broader than long; abdominal apex pointed. Male, brachypterous form and macropterous form: Unknown.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEEFF9AF6D3FAC2FC13FCEA.taxon	materials_examined	Type material examined (all micropterous). Holotype, female: FRENCH POLYNESIA, Society Islands, Raiatea, Mt. Toomaru summit area, 800 m, 16.8221 S, 151.4547 W, 7 February 2006, taken by pyrethrin fog of mossy Metrosideros collina trunk, R. Englund (BPBM). FRENCH POLYNESIA, Society Islands, Raiatea, 1 female, same data as holotype, (BPBM).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEEFF9AF6D3FAC2FC13FCEA.taxon	distribution	Distribution. French Polynesia, Society Islands, endemic to the island of Raiatea (Fig. 18).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEEFF9AF6D3FAC2FC13FCEA.taxon	etymology	Etymology. Named for Dr. Ron Englund, a stalwart colleague in the field, who collected the only two known specimens.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEEFF9AF6D3FAC2FC13FCEA.taxon	discussion	Discussion. Females of Prohydrometra species are for the most part quite similar, and therefore not suitable for species diagnosis. In the case of P. englundi, however, the presence of numerous long, fine, erect setae on the head and thorax (Figs. 12, 13), which are similar to the character state seen in Chaetometra robusta from the Marquesas, allow easy recognition of this taxon, despite the fact that only two females are in hand. This character state is unique among the currently known species placed in Prohydrometra. Although it was initially considered that P. englundi might be another geographically disjunct species of Chaetometra, due to the long setae on the body, the length of the head (Fig. 12), the very long and diagnostic antennomere III, and the slightly unequal coxal spacing (Fig. 13) all indicate a placement in Prohydrometra. In addition, the legs of P. engundi are far more slender, and lack the numerous long, erect pilose setae seen in Chaetometra (Figs. 35, 36). Ecological notes. The type series was taken by localized pyrethrin fogging of moss mats covering the trunk of a Metrosideros collina tree in the Mt. Toomaru summit area of Raiatea.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEBFF9BF6D3FCEFFEA4F81F.taxon	description	Figs. 11, 16 – 18, 24 Apterous male. Length 4.15, width 0.48. Color. Ground color brown; abdominal mediotergites light-brown, matte. Head tinged with blackish. Thorax anteriorly light colored dorsally, tinged with dark-brown elsewhere; abdominal mediotergites IV – VI light medially; each laterotergite with light area anteriorly. Venter of thorax and abdomen light-brown. Legs light-brown, antennae light-brown to brown; coxae and trochanters mostly light-brown. Structure. Head somewhat short for genus (1.45), widest at antenniferous tubercles (0.35); set with bristly setae beneath; gular lobe large, rounded; labium reaching well caudad of eyes, onto prosternum; head with anteocular portion slightly longer than postocular portion, ratio of anteocular / postocular portions: 0.80 / 0.60; interocular space / width of an eye: 0.13 / 0.10; anteclypeus small, broadly rounded anteriorly. Antennae with lengths of antennomeres I: II: III: IV = 0.20: 0.28: 1.80: 1.18 (Fig. 11). Pronotum length 0.55; remainder of thorax 0.30 (to lateral suture behind metacetabulae); abdomen length 1.65. Wing pads, if present, very small, not visible, hidden under pronotum. Thoracic and abdominal sterna with short bristly setae, about equally dense on all segments. Distance between anterior and middle coxae (measured between closest margins) 0.10; between middle and hind coxae 0.17. Acetabula without pits. Venter without black denticles. Proportions of legs as follows: Femur, tibia, tarsomere I, tarsomere II, tarsomere III of fore-leg, 1.45: 1.68: 0.05: 0.10: 0.12; of middle-leg, 1.50: 1.78: 0.05: 0.10: 0.15; of hind-leg, 2.15: 2.56: 0.05: 0.12: 0.18. First abdominal segment short, transverse, clearly delineated by a suture posteriorly. Mediotergites I and VII almost quadrate, others slightly longer than wide. Male abdominal sternum VII with two small, widely separated, triangular patches of bristle-like setae, directed ventrally, not close to anterior margin (Fig. 24); segment VIII cylindrical, unmodified, without distal process. Micropterous female. Length 4.30, width across abdomen 0.65. Similar in most respects to male, but abdomen broader, deeper, segment VII slightly curved upward, tergum VIII distally truncate, without distal process; margins of laterotergites without setae. Abdominal terminalia simple, without modification. Brachypterous form and macropterous form: Unknown.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEBFF9BF6D3FCEFFEA4F81F.taxon	materials_examined	Type material examined (all micropterous). Holotype, male: FRENCH POLYNESIA, Society Islands, Raiatea, east coast, Mitimitiaute River at " Trois Cascades " area, inland from Vairahi Bay, on wet bedrock faces flanking second cascade, 200 m, 16 ° 46 ' 27 " S, 151 ° 26 ' 35 " W, 11 September 2007, 13: 00 - 16: 30 hrs., CL 7521, D. A. Polhemus & J. T. Polhemus (BPBM). Paratypes: FRENCH POLYNESIA, Society Islands, Raiatea, 2 males, 4 females, same data as holotype, CL 7521 (BPBM, USNM).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEBFF9BF6D3FCEFFEA4F81F.taxon	distribution	Distribution. French Polynesia, Society Islands, endemic to the island of Raiatea (Fig. 18).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEBFF9BF6D3FCEFFEA4F81F.taxon	etymology	Etymology. Named for the late Dr. John T. Polhemus, an indefatigable field collector, who discovered the first specimens of this species on a rheocrene adjacent to the second fall at Trois Cascade (Fig. 17).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFEBFF9BF6D3FCEFFEA4F81F.taxon	discussion	Discussion. This is the smallest known species of Prohydrometra, and the only one known to have a semiaquatic ecology. The male of P. johnpolhemi differs from all other species of the genus by the modification of male abdominal ventrite VII, which possesses two small, widely separated, barely curved, sclerotized processes displaced from the anterior margin (Fig. 24). Although P. gagnei from Tahiti and P. moorea from Moorea also have ventrallydirected, spine-like processes on sternum VII, the processes in these latter species are larger, curved, and arise near the anterior margin of the ventrite (compare Figs. 19 – 21 with Fig. 24). Ecological notes. This species was found on hygropetric habitats in the gorge of the Mitimitiaute River on Raiatea. Prior to this discovery, hydrometrids had not been recorded from Raiaeta, or anywhere else in the western Society Islands. Subsequent analysis of collections made in upland cloud forest habitats on Mt. Toomaru by Dr. Ron Englund revealed the presence of a terrestial Prohydrometra species on Raiatea as well. These results suggest additional Prohydrometra species might be present in isolated cloud forest patches near the summits of Bora Bora, Tahaa, or Huahine islands. The type series of P. johnpolhemi was taken from wet bedrock walls adjacent to the second waterfall in a series of three (Figs. 16, 17). Individuals occurred on wet basalt bedrock, but only in those areas without large amounts of moss or sheeting flow. The immatures formed aggregations, and were orange in color when alive. This is the only species of Prohydrometra known to inhabit a semi-aquatic habitat, with all others being arboreal inhabitats of moss-covered trees in upland cloud forests. As such, the ecology of this species is an anomaly within this insular radiation.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE9FF99F6D3FB41FB6DFB49.taxon	description	Figs. 23, 25, 29 Apterous male. Length 6.60, width 0.38. Color. Ground color brown to blackish-brown; abdomen light-brown medially, matte. Head broadly tinged with blackish. Thorax anteriorly and medially light colored dorsally; abdominal mediotergites light medially; each laterotergite with light area anteriorly. Venter of thorax and abdomen dark. Legs light-brown, antennae light-brown to brown; coxae and trochanters mostly light-brown. Structure. Head relatively long (2.43), widest at antenniferous tubercles (0.40); set with bristly setae beneath; gular lobe large, rounded; labium reaching well caudad of eyes, onto prosternum; head with anteocular portion slightly longer than postocular portion, ratio of anteocular / postocular portions: 1.38 / 0.95; interocular space / width of an eye: 0.08 / 0.10; anteclypeus small, broadly rounded anteriorly. Antennae with lengths of antennomeres I: II: III: IV = 0.40: 0.50: 2.53: 1.45. Thorax with pronotum length 0.78; remainder of thorax 0.45 (to lateral suture behind metacetabula); abdomen length 2.70. Wing pads, if present, very small, not visible, hidden under pronotum. Thoracic and abdominal sterna with short bristly setae, about equally dense on all segments. Distance between anterior and middle coxae (measured between closest margins) 0.18; between middle and hind coxae 0.30. Acetabula without pits. Venter without black denticles. Proportions of legs as follows: Femur, tibia, tarsomere I, tarsomere II, tarsomere III of fore-leg, 2.50: 3.10: 0.05: 0.40: 0.20; of middle-leg, 2.80: 3.50: 0.07: 0.35: 0.18; of hind-leg, 3.90: 5.80: 0.07: 0.45: 0.20. First abdominal segment short, transverse, clearly delineated by a suture posteriorly. Mediotergites longer than wide. Male abdominal sternum VII with two elongate patches of erect bristles, widely separated, and displaced from the anterior margin (Fig. 23); segment VIII cylindrical, unmodified, without distal process. Micropterous female. Length 7.50, width across abdomen 1.40. Similar in most respects to male, including antennomere ratios, but abdomen broader; abdominal mediotergites II – VII longitudinally rectangular, tergum VIII trapezoidal, distally truncate, without distal process; margins of laterotergites without setae. Abdominal terminalia simple, without modification. Brachypterous and macropterous forms. Unknown.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE9FF99F6D3FB41FB6DFB49.taxon	materials_examined	Type material examined (all micropterous). Holotype, male: FRENCH POLYNESIA, Society Islands, Moorea, small gulch immediately W. of Mt. Tohiea summit (headwaters of Mahaeru River), 1150 m, 17 ° 33 ' 04 " S, 149 ° 49 ' 22 " W, 12 September 2006, 10: 40 – 15: 00 hrs., CL 7500, D. A. Polhemus (BPBM). Paratypes: FRENCH POLYNESIA, Society Islands, Moorea, 4 males, same data as holotype, CL 7500, D. A. Polhemus (BPBM, USNM); 1 female, Moorea, Mt. Tohiea, 17 ° 33 ' 04 " S, 149 ° 49 ' 23 " W, 1100 m, 12 September 2006, lot 04, pyrethrin fog of mossy log, J. K. Liebherr (CUIC); 1 female, Moorea, Mt. Tohiea, 17 ° 33 ' 04 " S, 149 ° 49 ' 23 " W, 1100 m, 12 September 2006, lot 03, beating Dicranopteris ferns, J. K. Liebherr (CUIC).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE9FF99F6D3FB41FB6DFB49.taxon	distribution	Distribution. French Polynesia, Society Islands, endemic to the island of Moorea (Fig. 29).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE9FF99F6D3FB41FB6DFB49.taxon	etymology	Etymology. The species name “ tohiea ” is a noun in apposition, and refers to the Mt. Tohiea type-locality, the highest summit on the island of Moorea.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE9FF99F6D3FB41FB6DFB49.taxon	discussion	Discussion. The male of P. tohiea differs from all other species of the genus in the modification of male abdominal ventrite VII, which possesses two widely separated, longitudinally elongated patches of bristles (Fig. 23). In the other two species in the genus which possess bristle patches rather than sclerotized processes, P. teatara from Tahiti and P. johnpolhemi from Raiatea, the patches are much smaller and roughly triangular in shape (compare Figs. 22 – 24). All of these species may represent individual island representatives of a common clade within the genus, but this has yet to be definitively established. Females of P. tohiea occur syntopically with those of P. moorea, and are quite similar in many respects, but in this sex the two species can be separated by the relative lengths of the antennomeres, with segment III being less than 6.5 times that of antennomere I in P. tohiea, versus over 7.3 times as long as antennomere I in P. moorea. Ecological notes. The type series was taken from a small pocket of wet forest immediately below the summit of Mt. Tohiea, bordered by sheer cliffs (Fig. 25). Prohydrometra tohiea occurred there in company with P. moorea, three species of locally endemic Nabidae (Nabis toheia D. Polhemus, 2010, N. mooreana D. Polhemus, 2010, and N. polynesica D. Polhemus, 2010), and an undescribed species of arboreal Saldidae. All were taken by light pyrethrin fogging of fern banks and mossy tree trunks, or by beating banks of Dicranopteris Bernh. ferns.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE8FF84F6D3FB7CFE96FF06.taxon	description	Figs. 21, 25, 29 Apterous male. Length 6.90, width 0.60. Color. Ground color brown to blackish-brown; abdominal mediotergites light-brown medially, matte. Head heavily tinged with blackish except base. Thorax anteriorly and medially light colored dorsally; each laterotergite with light area anteriorly. Venter of thorax and abdomen dark. Legs light-brown, antennae light-brown to brown; coxae and trochanters mostly light-brown. Structure. Head relatively long (2.18), widest at antenniferous tubercles (0.43); set with bristly setae beneath; gular lobe large, rounded; labium reaching well caudad of eyes, onto prosternum; head with anteocular portion slightly longer than postocular portion, ratio of anteocular / postocular portions: 1.20 / 0.80; interocular space / width of an eye: 0.12 / 0.13; anteclypeus small, broadly rounded anteriorly. Antennae with lengths of antennomeres I: II: III: IV = 0.40: 0.67: 3.20: 1.65. Pronotum length 0.83; remainder of thorax 0.43 (to lateral suture behind metacetabulae); abdomen length 3.40. Wing pads, if present, very small, not visible, hidden under pronotum. Thoracic and abdominal sterna with short bristly setae, about equally dense on all segments. Distance between anterior and middle coxae (measured between closest margins) 0.25; between middle and hind coxae 0.38. Acetabula without pits. Venter without black denticles. Proportions of legs as follows: Femur, tibia, tarsomere I, tarsomere II, tarsomere III of fore-leg, 2.10: 2.90: 0.05: 0.25: 0.22; of middle-leg, 2.80: 3.760: 0.05: 0.30: 0.20; of hind-leg, 3.70: 5.55: 0.05: 0.30: 0.20. First abdominal segment short, transverse, clearly delineated by a suture posteriorly. Mediotergites longer than wide. Male abdominal sternum VII with two large erect curved spines, widely separated, tipped with black bristles, arising near the anterior margin of segment (Fig. 21); segment VIII cylindrical, unmodified, lacking distal process. Micropterous female. Length 7.20, width across abdomen 1.20. Similar in most respects to male, but abdomen broader, deeper, segment VII very slightly curved upward, tergum VIII distally truncate, without distal process; margins of laterotergites without setae. Abdominal terminalia simple, without modification. Brachypterous and macropterous forms. Unknown.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE8FF84F6D3FB7CFE96FF06.taxon	materials_examined	Type material examined (all micropterous). Holotype, male: FRENCH POLYNESIA, Society Islands, Moorea, small gulch immediately W. of Mt. Tohiea summit (headwaters of Mahaeru River), 1150 m, 17 ° 33 ' 04 " S, 149 ° 49 ' 22 " W, 12 September 2006, 10: 40 – 15: 00 hrs., CL 7500, D. A. Polhemus (BPBM). Paratypes: FRENCH POLYNESIA, Society Islands, Moorea, 3 males, 6 females, same data as holotype, CL 7500, D. A. Polhemus (BPBM, USNM); 1 female, Moorea, Mt. Tohiea, 17 ° 33 ' 04 " S, 149 ° 49 ' 23 " W, 1120 m, 12 September 2006, lot 05, from rotten Freycinetia fronds and leaves, J. K. Liebherr (CUIC).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE8FF84F6D3FB7CFE96FF06.taxon	distribution	Distribution. French Polynesia, Society Islands, endemic to the island of Moorea (Fig. 29).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE8FF84F6D3FB7CFE96FF06.taxon	etymology	Etymology. The species name “ moorea ” is a noun in apposition, and refers to the Moorea island type-locality.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFE8FF84F6D3FB7CFE96FF06.taxon	discussion	Discussion. Males of P. moorea are similar to those of P. gagnei from Tahiti in having a pair of curved, sclerotized processes on male abdominal ventrite VII (compare Figs. 19, 21), suggesting that the two species may be members of the same clade within the genus. However, in comparison to P. gagnei, the processes in P. moorea are more widely separated, and set further back from the anterior margin of the segment (compare Figs. 19 – 21). Ecological notes. The type series of P. moorea was taken in company with that of P. tohiea by localized pyrethrin fogging in a small pocket of tangled, wet forest at the summit of Mt. Tohiea, the highest point on the island of Moorea (Fig. 25). For additional details of that site and associated species see the previous discussion under the latter species.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF5FF84F6D3FEB6FADEF8FA.taxon	description	Figs. 22, 26, 29 Apterous male. Length 5.85, width 0.50. Color. Ground color brown; abdominal mediotergites light-brown, matte. Head broadly tinged with blackish on both anteocular and postocular parts. Thorax medially light colored dorsally, metanotum with median light area spreading along anterior margin of abdomen; each laterotergite with light area anteriorly. Venter of thorax and abdomen dark. Legs light-brown, antennae light-brown to brown; coxae and trochanters mostly light-brown. Structure. Head relatively long (2.30), widest at antennal tubercles (0.35); set with bristly setae beneath; gular lobe large, rounded; labium reaching well caudad of eyes, onto prosternum; head with anteocular portion slightly longer than postocular portion, ratio of anteocular / postocular portions: 1.35 / 0.90; interocular space / width of an eye: 0.10 / 0.08; anteclypeus small, broadly rounded anteriorly. Antennae with lengths of antennomeres I: II: III: IV = 0.28: 0.35: 2.08: 1.30. Pronotum length 0.73; remainder of thorax 0.48 (to lateral suture behind metacetabula); abdomen length 2.40. Wing pads, if present, very small, not visible, hidden under pronotum. Thoracic and abdominal sterna with short bristly setae, about equally dense on all segments. Distance between anterior and middle coxae (measured between closest margins) 0.20; between middle and hind coxae 0.28. Acetabula without pits. Venter without black denticles. Proportions of legs as follows: Femur, tibia, tarsomere I, tarsomere II, tarsomere III of fore-leg, 2.10: 2.48: 0.05: 0.35: 0.22; of middle-leg, 2.30: 2.67: 0.05: 0.40: 0.20; of hind-leg, 2.70: 4.20: 0.05: 0.50: 0.22. First abdominal segment short, transverse, clearly delineated by a suture posteriorly. Mediotergites longer than wide. Male abdominal sternum VII with two patches of erect bristles, set close together, but separated from the anterior margin (Fig. 22); segment VIII cylindrical, unmodified, without distal process. Micropterous female. Length 6.80, width across abdomen 0.75. Similar in most respects to male, but abdomen broader, deeper; tergum VIII distally truncate, without distal process; margins of laterotergites without setae. Abdominal terminalia simple, without modification. Brachypterous and macropterous forms. Unknown.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF5FF84F6D3FEB6FADEF8FA.taxon	materials_examined	Type material examined (all micropterous). Holotype, male: FRENCH POLYNESIA, Society Islands, Tahiti, Tahiti Iti, Mts Teatara, 1085 m, 17 ° 47 ' 48 " S, 149 ° 14 ' 18 " W, 7 September 2006, Lot 01, pyrethrin fog of horizontal mossy log, J. K. Liebherr (CUIC). Paratype: FRENCH POLYNESIA, Society Islands, Tahiti: 1 female, Tahiti Iti, Mts Teatara, 1080 – 1100 m, 17 ° 47 ' 47 " S, 149 ° 14 ' 20 " W, 17 September 2006, Lot 07, pyrethrin fog on mossy Weimannia trunk, J. K. Liebherr (CUIC).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF5FF84F6D3FEB6FADEF8FA.taxon	distribution	Distribution. French Polynesia, Society Islands, endemic to Tahiti, on Tahiti Iti (Fig. 29).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF5FF84F6D3FEB6FADEF8FA.taxon	etymology	Etymology. The species name “ teatara ” is a noun in apposition, and refers to the Teatara massif type-locality, on the island of Tahiti.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF5FF84F6D3FEB6FADEF8FA.taxon	discussion	Discussion. Prohydrometra teatara is the smaller of the two Prohydrometra species known from Tahiti, with a male body length less than 6.0 mm, and a female body length of less than 7.0 mm. It may be easily distinguished from P. gagnei, the other Tahitian species, by the structure of male abdominal ventrite VII, which bears two small patches of black bristles (Fig. 22), rather than the large, hooked, sclerotized processes seen in P. gagnei (Figs. 19, 20). The other two Prohydrometra species that bear patches of bristles on male abdominal ventrite VII either have these patches far more elongate, as in P. tohiea from Moorea (Fig. 23), or far more widely separated, as in P. johnpolhemi from Raiatea (Fig. 24). Ecological notes. The two known specimens of P. teatara were obtained by light pyrethrin fogging of mossy logs or Weinmannia L. tree trunks, indicating that it has a terrestrial ecology similar to other Prohydrometra species.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF4FF83F6D3FF07FB49FDB2.taxon	description	Figs. 9, 10, 19, 20, 27 – 29	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF4FF83F6D3FF07FB49FDB2.taxon	description	Color. Ground color brown to blackish-brown; abdominal mediotergites light-brown medially, matte. Head heavily tinged with blackish except at base. Thorax anteriorly and medially light colored dorsally; each laterotergite with light area anteriorly. Venter of thorax and abdomen dark-brown. Legs light-brown, antennae light-brown to brown; coxae and trochanters mostly light-brown. Structure. Very similar to the female previously described, except somewhat narrower, and with abdominal sternum VII modified. Acetabula lacking pits. Venter without black denticles. Proportions of legs similar to the female previously described. All legs with bristly setae, including on coxae, longer basally, but distally with setae about as long as width of segment; setae more pronounced in male than in female. First abdominal segment short, transverse, clearly delineated by a suture posteriorly. Mediotergites longer than wide. Mediotergites VII and VII thickly set with moderate length semi-erect setae; abdominal sternum VII with two large, erect curved spines, set close together, arising near the anterior margin (Figs. 19, 20); segment VIII cylindrical, unmodified, without distal process.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF4FF83F6D3FF07FB49FDB2.taxon	materials_examined	Material examined (all micropterous). SOCIETY ISLANDS, Tahiti: 1 male, Tahiti Nui, Mt. Marau summit, 1400 m, 20 September 1977, J. Gourves (holotype, BPBM); 2 females, Tahiti Nui, Mt Marau, fern gulley along road to summit, 1380 m, 17 ° 36 ' 28 " S, 149 ° 32 ' 09 " W, 10 September 2006, CL 7498, D. A. Polhemus (USNM); 3 males, 8 females, same data as preceding, 2 September 2007, CL 7498, D. A. Polhemus and J. T. Polhemus (BPBM, USNM); 6 males, 7 females, Tahiti Nui, Mt. Mauru, trail to summit between Pylon 3 and Pylon 4, 1030 m, 17 ° 38 ' 04 " S, 149 ° 22 ' 04 " W, 6 September 2006, 13: 30 – 15: 00 hrs., CL 7486, D. A. Polhemus (BPBM, USNM); 3 males, 5 females, same locality and date as preceding but J. K. Liebherr (CUIC).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF4FF83F6D3FF07FB49FDB2.taxon	distribution	Distribution. French Polynesia, Society Islands, endemic to the island of Tahiti, on Tahiti Nui (Fig. 29).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF4FF83F6D3FF07FB49FDB2.taxon	discussion	Discussion. Prohydrometra gagnei may be recognized among its congeners by the pair of large, posteriorlycurved, sclerotized processes on male abdominal venrtite VII, which arise near the anterior margin of the segment and are set moderately close together. This character state is similar to that seen in P. moorea, but in that species the processes are somewhat removed from the anterior margin of the ventrite, and set further apart (compare Figs. 19 – 21). Certain specimens of P. gagnei from Mt. Mauru, in eastern Tahiti Nui, exhibit an atypical yellowish-brown coloration (Fig. 20). At first it was thought that these might represent a different species, but because they are morphologically similar to the other specimens in hand, it is concluded that this color morph simply represents a degree of intraspecific variation. Ecological notes. Our knowledge of the habits of P. gagnei is based primarily on many hours of intensive collecting activity on Mt. Marau, a summit above Papeete which can be reached by a road to a radio tower, and indicates that the species is similar in its habitat preferences to the species occupying Mt. Tohiea on Moorea. The majority of the captures have come by fogging vertical exposures of dry Dicranopteris fern fronds along the margins of headwater gulches or upland trails (Fig. 27). Only two specimens have been taken by beating, and both of these were obtained by pushing a net deep inside Dicranopteris fern banks so that it penetrated the dry fronds of the interior, then beating on the overlying fern mass. This apparent preference for masses of dry Dicranopteris fronds is also shared by certain micropterous Nabis species (N. tahitiensis D. Polhemus, 2010, N. orohena D. Polhemus, 2010, N. tangaroa D. Polhemus, 2010, N. tiki D. Polhemus, 2010) with which P. gagnei is frequently syntopic. An additional series of P. gagnei was taken from Dicranopteris fern banks on Mt. Mauru, a very wet mountain lying in the eastern section of Tahiti Iti. The habits of the species at this locality were very similar to those observed at Mt. Marau above Papeete, with the specimens being obtained by fogging dense fern banks along the trail (Fig. 28). The captures of P. gagnei at the type-locality on Mt. Marau have consisted largely of females, and it was only after a fourth visit to the summit area of Mt. Marau in 2007 that the males of the species were finally obtained there. The capture ratio of sexes to date at this site has been approximately six females to one male. By contrast, other collections of this species on Mt. Mauru, further to the east, have produced roughly similar numbers of males and females. It is not clear if males of P. gagnei at Mt. Marau live in slightly different microhabitats that make them less amenable than females to collection by fogging and beating, the two primary methods used to date.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF2FF83F6D3FCF1FC6BF888.taxon	description	Figs. 30 – 34	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF2FF83F6D3FCF1FC6BF888.taxon	discussion	Discussion. The extremely elongate head with reduced eyes (Fig. 32) will immediately distinguish this taxon from any other in Hydrometridae. The original description by Van Duzee (1934) stated that the male holotype, which is housed in the Bishop Museum, was also accompanied by a male paratype, but this latter specimen is not present in the Bishop Museum collection. Hungerford (1939) noted that he had examined this paratype, and it is possible that it may still be retained in the collection at the University of Kansas. Photographs of the holotype are provided here to aid in future recognition of this extremely aberrant species (Figs. 30 – 32). Ecological notes. Dolichocephalometra pacifica was described based on two male specimens taken in 1931 on Mt. Hitikau, the highest summit on the small island of Ua Huka, in the Marquesas (Van Duzee, 1934). No specimens have been seen since, so an effort was made on 2 November 1999 to revist the type-locality in search of additional examples. Cloud forest on Ua Huka is confined to the eastern portion of the island's central ridge, lying around 900 m elevation, and the name Hitikau means “ the mountain where one goes up by swimming through vegetation. ” This appellation is appropriate, in that Hitikau was the only summit sampled in the Marquesas which lacked mossy, emergent trees, being covered instead with a rather uniform mixture of low stature Hibiscus tiliaceus (L.) Fryxell and Freycinetia arborea (Fig. 33), with an understory of ferns, matching a previous description provided by Adamson (1936). A few moist, protected sites on the slopes also supported tree ferns and broad-leafed shrubs. Moss began to cover the Hibiscus branches on the upper 100 meters of the mountain, but the pads were not dense, and many were dry to the touch, despite the misty weather. Collecting for Heteroptera here was poor, and no additional specimens of D. pacific a were obtained, but the visit was sufficient to confirm that no aquatic habitat is present at the typelocality, and that this species is almost certainly terrestrial.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF2FF83F6D3FCF1FC6BF888.taxon	distribution	Distribution. French Polynesia, Marquesas Islands, Ua Huka (Fig. 34).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFF2FF83F6D3FCF1FC6BF888.taxon	materials_examined	Material examined. FRENCH POLYNESIA, Marquesas Islands, Ua Huka: 1 female, Hitikau, 2900 ft., on ferns 20 January 1932, leg. LeBronnec and H. Tauraa (holotype, BPBM).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFFFFF8CF6D3FA33FCD4FAB3.taxon	description	Figs. 5 – 8, 35 – 38	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFFFFF8CF6D3FA33FCD4FAB3.taxon	discussion	Discussion. Hungerford (1939) originally described this species in the genus Trichometra, which proved to be a primary homonym of Trichometra Clark, 1908 in the Crinoidea, necessitating the replacement name Chaetometra (Hungerford, 1950). Chaetometra robusta may be easily recognized within Hydrometridae as a whole by its rather short head and highly setiferous body and appendages. Photographs of the holotype, held in the Bishop Museum, are provided here to aid in future recognition of this unusual species (Figs. 35 – 37). Ecological notes. The species is known from a single specimen taken in 1932 on Mt. Temetiu, the highest summit on the island of Hiva Oa in the Marquesas, and additional surveys there by a team of entomologists in October 1999 and again in August 2001, the latter operating for several days out of a research camp established on the upper mountain (Figs. 5 – 8), failed to locate additional specimens. Instead, these surveys collected examples of the new genus and species Marquesametra hivaoa, and a description of the ecological setting can be found under that species. Given the absence of aquatic habitats on the crest of Mt. Temetiu, and the notation on the holotype label that the specimen was taken on ferns, it is clear that C. robusta has a terrestrial ecology, but may occupy a specialized and unusual habitat.	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFFFFF8CF6D3FA33FCD4FAB3.taxon	distribution	Distribution. French Polynesia, Marquesas Islands, Hiva Oa (Fig. 38).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
FC3D2479FFFFFF8CF6D3FA33FCD4FAB3.taxon	materials_examined	Material examined. FRENCH POLYNESIA, Marquesas Islands, Hiva Oa: 1 female, Temetiu Summit, 4160 ft., on ferns 20 January 1932, leg. LeBronnec (holotype, BPBM).	en	Polhemus, Dan A. (2022): Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia. Zootaxa 5190 (1): 69-98, DOI: 10.11646/zootaxa.5190.1.3
