The mean home range of males, of _Z. hudsonius_ in Minnesota, according to Quimby (1951:86), was 2.70 plus or minus .50 acres; this was significantly larger than the mean home range of females, 1.57 plus or minus .27 acres. According to Quimby (_loc. cit._), the size and shape of the home range is influenced by the general features of the terrain, density and type of cover, and land use in the immediate area. Quimby (1951:94) remarked that the home range of the jumping mouse is relatively unstable and Blair (1940:247) stated that the home ranges of both sexes generally overlapped the ranges of other members of the same species and sex. The average size of the home range for _Z. hudsonius_ in Michigan was .89 plus or minus .11 acres for males and .92 plus or minus .11 acres for females. =Zapus hudsonius acadicus= (Dawson) _Meriones acadicus_ Dawson, Edinburgh New Philos. Jour., new ser., 3:2, 1856. _Meriones labradorius_, Dawson, Edinburgh New Philos. Jour., new ser., 3:2, 1856. _Jaculus hudsonius_, Baird, Rept. Expl. and Surv...., 8 (pt. 1):433, July 14, 1858 (part--the part from Nova Scotia, Vermont, and New York). _Zapus hudsonius_, Coues, Bull. U. S. Geol. and Geog. surv. of the territories, 2nd ser., No. 5:260, 1877 (part--the part from Nova Scotia, Vermont, and New York); Preble, N. Amer. Fauna, 15:17, August 8, 1899 (part--the part from New Brunswick, Nova Scotia, Maine, New Hampshire, Vermont, Massachusetts, and northeastern New York). _Zapus hudsonius canadensis_, Batchelder, Proc. New England Zool. Club, 1:5, February 8, 1899 (part--the part from Keene Valley in Essex County of New York, and Orivell in Vermont); Anderson, Ann. Rept. Provancher Soc. Nat. Hist., Quebec, 1941:35-37, July 14, 1942 (part--the part from the tip of the Gaspé Peninsula in Quebec, New Brunswick, Maine, New Hampshire, Vermont, and New York). _Zapus hudsonius hardyi_, Batchelder, Proc. New England Zool. Club, 1:6, February 8, 1899, type from Mt. Desert Island, Hancock County, Maine; Bole and Moulthrop, Sci. Publ. Cleveland Mus. Nat. Hist., 5:165, September 11, 1947 (part--but excluding Pennsylvania and Ohio). _Zapus hudsonius acadicus_, Anderson, Ann. Rept. Provancher Soc. Nat. Hist., Quebec, 1941:38, July 14, 1942. _Type._--No type specimen designated. Subspecies characterized from specimens obtained in Nova Scotia. _Range._--Gaspé Peninsula of Quebec, New Brunswick, Nova Scotia, Prince Edward Island, Maine, New Hampshire, Vermont, Massachusetts, northern Connecticut and northeastern New York. See fig. 47. Zonal range: Transition and Canadian.