Feb., 191 2. Mammals of Illinois and Wisconsin — Cory. 247 



Zapus hudsonius (Zimm.). 

 Hudson Bay Jumping Mouse. 



Dipus hudsonius Zimmermann, Geog. Gesch. Mensch. u. vierfiiss. Thiere, II, 1780, 

 p. 358. 



Jaculus americanus Wagler, Nat. Syst. Amphib., 1830, p. 23. 



Meriones Americanus Lapham, Trans. Wis. State Agr. Soc, II, 1852 (1853), p. 339 

 (Wisconsin). 



Jaculus hudsonius Baird, Mammals N. Amer., 1857, p. 430 (in part). Miles, 

 Rept. Geol. Surv. Mich., I, i860 (1861), p. 221 (Michigan). Allen, Proc. 

 Bost. Soc. Nat. Hist., XIII, 1869 (1871), p. 192 (Iowa). Strong, Geol. Wis. 

 Surv., 1873-79, I, 1883, p. 438 (Wisconsin). 



Jaculus lahradorius Kennicott, Agr. Rept. for 1856, U. S. Patent Office Rept., 

 1857, P- 95 (Illinois). 



Zapus hudsonius Coues & Allen, Monog. N. Amer. Rodentia, 1877, p. 476 

 (Cook Co., Illinois). Herrick, Geol. & Nat. Hist. Surv. Minn., Bull. No. 7, 

 1892, p. 218 (Minnesota). Osborn, Proc. Iowa Acad. Sci., 1887-89 (1890), 

 p. 43 (Iowa). Evermann & Butler, Proc. Ind. Acad. Sci., 1893 (1894), p. 125 

 (Indiana). Preble, N. Amer. Fauna, No. 15, 1899, p. 15 (Indiana, Wisconsin, 

 Michigan, Minnesota, Ontario). Miller, 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). Adams, Rept. State Board Geol. Surv. 

 Mich., 1905 (1906), p. 129 (Michigan). Jackson, Bull. Wis. Nat. Hist. Soc, 

 VI, 1908, p. 24 (Wisconsin). Hollister, Bull. Wis. Nat. Hist. Soc, VI, 1908, 

 p. 140 (Wisconsin). Hahn, Ann. Rept. Dept. Geol. & Nat. Resources Ind., 

 1908 (1909), p. 528 (Indiana). Evermann & Clark, Proc. Wash. Acad. Sci., 

 XIII, 191 1, p. 25 (Indiana). 



Type locality — Hudson Bay. 



Distribution — From Hudson Bay to New Jersey, and in the mountains 

 to North CaroHna, 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 

 3^ellowish 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.). 



