Fes., 1912. MAMMALS OF ILLINOIS AND WISCONSIN — Cory. 247 
Zapus hudsonius (Zimw.). 
Hupson Bay Jumprnc Mouse. 
Dipus hudsonius ZIMMERMANN, Geog. Gesch. Mensch. u. vierftiss. Thiere, II, 1780, 
p- 358. 
Jaculus americanus WAGLER, Nat. Syst. Amphib., 1830, p. 23. 
Meriones Americanus Lapuam, Trans. Wis. State Agr. Soc., II, 1852 (1853), p. 339 
(Wisconsin). 
Jaculus hudsonius BarrD, Mammals N. Amer., 1857, p. 430 (in part). MuzEs, 
Rept. Geol. Surv. Mich., I, 1860 (1861), Pp. 221 (Michigan). ALLEN, Proc. 
Bost. Soc. Nat. Hist., XIII, 1869 (1871), p. 192 (Iowa). SrroncG, Geol. Wis. 
Surv., 1873-79, I, 1883, p. 438 (Wisconsin). 
Jaculus labradorius KENNicoTt, Agr. Rept. for 1856, U. S. Patent Office Rept., 
1857, p. 9§ (Illinois). 
Zapus hudsonius Cours & ALLEN, Monog. N. Amer. Rodentia, 1877, p. 476 
(Cook Co., Illinois). Herrick, Geol. & Nat. Hist. Surv. Minn., Bull. No. 7 
1892, p. 218 (Minnesota). OsBorNn, Proc. Iowa Acad. Sci., 1887-89 (1890), 
p. 43 (lowa), EveRMANN & But~er, Proc. Ind. Acad. Sci., 1893 (1894), p. 125 
(Indiana). Presie, N. Amer. Fauna, No. 15, 1899, p. 15 (Indiana, Wisconsin, 
Michigan, Minnesota, Ontario). MuILLER, Proc. Bost. Soc. Nat. Hist., XXVIII, 
1897, p. 9 (North Bay and Nepigon, Ontario). SNyDER, Bull. Wis. Nat. Hist. 
Soc., II, 1902, p. 116 (Wisconsin). ApAMs, Rept. State Board Geol. Surv. 
Mich., 1905 (1906), p. 129 (Michigan). Jackson, Bull. Wis. Nat. Hist. Soc., 
VI, 1908, p. 24 (Wisconsin). HoLtister, Bull. Wis. Nat. Hist. Soc., VI, 1908, 
p- 140 (Wisconsin). Haun, Ann. Rept. Dept. Geol. & Nat. Resources Ind., 
1908 (1909), p. 528 (Indiana). EVERMANN & CLarRK, Proc. Wash. Acad. Sci., 
XIII, 1911, p. 25 (Indiana). 
Type locality — Hudson Bay. 
Distribution — From Hudson Bay to New Jersey, and in the mountains 
to North Carolina, west through Ohio, Indiana, and greater portion 
of Illinois to Missouri and Minnesota. Intergrades with ameri- 
canus in the southeastern portion of its range, and with campestris 
near the edge of the Great Plains. 
Description — Body about the size of the Common House Mouse, but 
hind legs elongated and tail noticeably long and slender; top of 
head and back dark ochraceous brown; sides of body tawny or 
yellowish brown mixed with darker hairs; under parts and feet 
white or whitish, usually a clear yellowish brown line separating 
the color of the sides of the body from the white of the under parts; 
tail dark above, whitish beneath; a dusky mask near nose at base 
of the whiskers. 
Measurements — Total length, 7.50 to 8.50 in. (190 to 215 mm.); tail 
vertebrae, 4.50 to 5.25 in. (115 to 133 mm.); hind foot, 1.15 to 
1.24 in. (29.5 to 31 mm.). 
