WYOMING: _Crook County_: Devils Tower, flood plain Belle Fourche River, 3350 ft., 1 (USBS); Bear Lodge Mts., 4 (USBS); _15 mi. N Sundance, Black Hills Nat'l Forest, 5500 ft._, 2; _3 mi. NW Sundance, 5900 ft._, 17; _Sundance_, 2 (USBS). _Weston Co._: 1-1/2 mi. E Buckhorn, 6150 ft., 5.
_Marginal records._--Montana: Rotten Grass Creek, N base Big Horn Mts. South Dakota: Nelsons Place, 3 mi. SE Hill City; Wind Cave Nat'l Park Game Ranch, Cold Spring Creek. Wyoming: 1-1/2 mi. E Buckhorn, 6150 ft.
_Dipus canadensis_ Davies, Trans. Linn. Soc. London, 4:157, 1798.
_Zapus hudsonius hudsonius_, Preble, N. Amer. Fauna, 15:17, August 8, 1899 (part--the part from Ontario).
_Zapus hudsonius canadensis_, Batchelder, Proc. New England Zool. Club, 1:5, February 8, 1899 (part--the part from Quebec); Anderson, Rept. Provancher Soc. Nat. Hist., Quebec, 1941:35-37, July 14, 1942 (part--the part from Quebec excepting the Gaspé Peninsula).
_Zapus hudsonius ontarioensis_ Anderson, Ann. Rept. Provancher Soc. Nat. Hist., Quebec, 1942:59, September 7, 1943, type from Pancake Bay (Batchawana Bay) southeast end of Lake Superior, Algoma District, about 40 miles northeast of Sault Ste-Marie, Ontario.
_Type._--No type specimen designated, subspecies characterized on the basis of two specimens obtained by Major General Thomas Davies within a few miles of the city of Quebec.
_Range._--Eastern Ontario and western Quebec from Hudson Bay southward to the Great Lakes and into northwestern New York. See fig. 47. Zonal range: Transition and Canadian.
_Description._--Size medium; back from near Clay Color to near Cinnamon-Buff with admixture of black hair usually forming a dorsal band; sides from near Clay Color to near Cinnamon-Buff and lighter than back; lateral line usually distinct, and clear Cinnamon-Buff; belly white, sometimes with slight suffusion of Cinnamon-Buff mid-ventrally; tail bicolored, brownish to brownish-black above, grayish-white to yellowish-white below; ears dark, sometimes flecked with color of the sides, edged with Cinnamon-Buff; feet grayish-white above; auditory bullae large, relatively broad and flat; incisive foramina relatively short and narrow, widest posteriorly; zygomata not widely bowed outward; mastoid region relatively wide; frontal region well inflated; nasals relatively narrow, short, and parallel sided.