Fig. 114. Distribution of the montane and Townsend meadow mice in Washington. A. Microtus montanus nanus. B. Microtus montanus canescens. C. Microtus townsendii townsendii. D. Microtus townsendii pugeti.
Microtus montanus nanus ([Merriam])
Arvicola (Mynomes) nanus [Merriam], N. Amer. Fauna, 5:63, July 30, 1891.
Microtus nanus [Miller], Proc. Biol. Soc. Washington, 11:67, April 21, 1897.
Microtus nanus nanus [Miller], Bull. U. S. Nat. Mus., 128:409, April 29, 1924.
Microtus montanus nanus [Hall], Proc. Biol. Soc. Washington, 51:133, August 23, 1938.
Type.—Obtained in the Pahsimeroi Mountains, 9,300 ft., Custer County, Idaho, by C. H. [Merriam] and V. [Bailey] on September 16, 1890; type in United States National Museum.
Racial characters.—Size medium; color of upper parts brownish gray; sides paler; underparts grayish white.
Measurements.—A large male from Prescott, Walla Walla County, measures: total length 168; length of tail 48; hind foot 20. A female from Prescott, Walla Walla County, and a female from Pullman, Whitman County, average: 133; 31; 18.5.