Key to the species of Kerevata Belokobylskij
1. Antennal flagellum uniformly yellow or yellow-brown (Figs 1A, 3A, 5A, 7A); hind wing vein RS vertical (Figs 4D, 8C) (except in K. longi); second metasomal tergite without distinct midlongitudinal carina, if present, very fine (Figs 2F, 4F, 6F, 8A, 10B); wings hyaline or with brown pattern (Figs 2C, 4C, 6C, 8C); mesosoma 1.8–2.1 × as long as high................. 2
- Antennal flagellum black, with or without white band or tip (Figs 9A, D, 10C); hind wing vein RS longitudinal (Fig. 10F); second metasomal tergite with distinct midlongitudinal carina (Figs 9B, C, 10E); wings uniformly brown or fuscous on distal half, sometimes with pale base (Figs 9A, B); mesosoma less than 1.8 × as long as high.............................. 6
2 Head and mesosoma largely orange-yellow or yellow brown or at most with some dark marks on mesopleuron and propodeum (Figs 7A, 9E, F, 10A); pterostigma medially brown or black (Figs 8C, D, 9D); occiput medially yellow................. 3
- Head and mesosoma extensively marked with dark brown or black, at least temple near occipital carina, vertex, pronotum, mesoscutum laterally and mesosternum (Figs 1A, 3A, 5A); pterostigma medially yellow (Figs 2C, 4C, 6C); occiput medially brown (Figs 1C, 3C, 5C)............................................................................... 4
3 Mesoscutum with confluence of notauli largely smooth (Fig. 7F); first metasomal tergite 2.2 × as long as its apical width; pronotum weakly protruding in front of mesoscutum (Fig. 7E); pterostigma brown with paler base and apex (Figs 8C, D); hind femur completely yellow (Fig. 8B) [Bismark Archipelago]................................. K. pacifica Belokobylskij
- Mesoscutum with confluence of notauli strongly rugose (Fig. 9F); first metasomal tergite 1.9 × as long as its apical width; pronotum strongly protruding in front of mesoscutum (Figs 9E, F); pterostigma entirely black (Fig. 9D); hind femur apical half black (Fig. 9D) [Papua New Guinea]............................................. K. hammondi Butcher & Quicke
4 Frons without radiating striae laterally (Fig. 1C); body mostly yellow (Fig. 1A); propodeum with more or less triangular medio-posterior areola (Fig. 2A); subbasal cell on the apex of fore wing without glabrous patch (Fig. 2D); metapleuron smooth anteriorly (Fig. 1E); hind wing vein M+CU 1.6 × 1Ma+1Mb [India].. K. orientalia Ranjith, Quicke & Priyadarsanan sp. nov.
- Frons with radiating striae laterally (Figs 3C, 5C); body mostly dark brown to black (Figs 3A, 5A); propodeum without medioposterior areola (Figs 4A, 6E); subbasal cell on the apex of fore wing with glabrous patch (Figs 4D, 6D); metapleuron rugose anteriorly (Fig. 3E); hind wing vein M+CU more than 1.6 × 1Ma+1Mb.......................................... 5
5 Middle lobe of mesoscutum distinctly raised above lateral lobe in lateral view (Figs 3D, E); mesoscutum irregularly rugose medio-posteriorly (Fig. 3F); length of fore wing vein 1CUb 1.5 × 1CUa; posterior curved part of fore wing M+CU1 long, sclerotised spot in subbasal cell situated far from 1 cu-a (Fig. 4C); hind wing vein RS longitudinal (Fig. 4D); propodeum with sublateral longitudinal carina (Fig. 4A); mesopleuron with yellow spot medially (Fig. 3E) [India].................................................................................. K. kethai Ranjith, Quicke & Priyadarsanan sp. nov.
- Middle lobe of mesoscutum parallel to lateral lobe in lateral view (Fig. 5E); mesoscutum transversely striate-rugose medio-posteriorly (Fig. 5F); length of fore wing vein 1CUb 5.8 × 1CUa; posterior curved part of fore wing M+CU1 short, sclerotised spot in subbasal cell situated much closely to 1 cu-a (Fig. 6C); hind wing vein RS transverse (Fig. 6D); propodeum without sublateral longitudinal carina (Fig. 5F); mesopleuron without yellow spot medially (Fig. 5E) [Vietnam]............................................................................................. K. longi Belokobylskij sp. nov.
6 First metasomal tergite almost parallel-sided (Fig. 9C); occipital carina distinctly sinuous and not pointed medio-dorsally (Fig. 9B); mesoscutum longitudinally striate between notauli posteriorly (Fig. 9B); fore wing vein 1CUb straight (Fig. 9B); frons entirely smooth and shiny; antenna (female only) black with a pre-apical pale stripe (Fig. 9A); head and mesosoma entirely orange-red (Figs 9A, B); metasoma black (Fig. 9C) [Papua New Guinea]................. K. clarksoni Butcher & Quicke
- First metasomal tergite markedly widening posteriorly (Fig. 10E); occipital carina evenly rounded or medially pointed mediodorsally; mesoscutum rugulose between notauli posteriorly; fore wing vein 1CUb strongly arched (Fig. 10F); frons with at least some distinct carination; antenna without pre-apical pale band (Fig. 10C); head largely black, mesosoma with strong black markings (Figs 10C, D); metasomal tergite 1 and most of 2 white (Fig. 10E) [Papua New Guinea]................................................................................................ K. jamesmayi Butcher & Quicke