Microtus agrestis (Linnaeus, 1761) . Fauna Suec., 11(2):11.

TYPE LOCALITY: Sweden, Uppsala .

DISTRIBUTION: Britain, Scandinavia, and France east through Europe and Siberia to Lena River; south to Pyrennes, N. Portugal, N. Yugoslavia, Altai Mtns., Sinkiang (China) (SW), and Lake Baikal.

COMMENT: Subgenus Microtus; see Anderson, 1959, Univ. Kans. Publ. Mus. Nat. Hist., 9:496 ( Arvalomys of Chaline, 1974:440-450). Sometimes regarded as conspecific with pennsylvanicus, as by Klimkiewicz, 1970, Mammalia, 34:641-665, but not closely related; see Frank, 1959, Z. Saugetierk., 24:91-93, and Vorontsov and Lyapunova, 1976, in Kontrimavichus, ed., [Beringia in Cenozoic], Acad. Sci. Vladivostok.

ISIS NUMBER: 5301410008080001001.