FEB., 1912. MAMMALS OF ILLINOIS AND^WISCONSIN CORY. 185 



Measurements Total length, about 7 in. (178 mm.); tail vertebrae, 



3 in. (76 mm.); hind foot, .85 in. (21 mm.). 



This species occurs in southern Illinois. Its habits are similar to 

 those of the Northern White-footed Mouse, Peromyscus leucopus 

 noveboracensis. 



Specimens examined from Illinois: 

 Illinois Reevesville, Johnson Co., 14; Ozark, Johnson Co., 18; 



Golconda, Pope Co., 8; Olive Branch, Alexander Co., 8 = 48. 



Peromyscus leucopus noveboracensis (FISCHER). 



NORTHERN WHITE-FOOTED MOUSE. 

 NORTHERN WHITE-FOOTED WOOD MOUSE. WOODLAND DEER MOUSE. 



[Mus sylvaticus] Noveboracensis FISCHER, Synopsis Mamm., 1829, p. 318. 

 Mus leucopus LAPHAM, Trans. Wis. State Agr. Soc., II, 1852 (1853), p. 340 (Wiscon- 

 sin). KENNICOTT, Agr. Rept. for 1856, U. S. Patent Office Rept., 1857, P- 9 

 (Illinois). SNYDER, Bull. Wis. Nat. Hist. Soc., II, 1902, p. 117. 

 Vesperimus leucopus HERRICK, Geol. & Nat. Hist. Surv. Minn., Bull. No. 7, 1892, 



p. 178 (Minnesota). 

 Hesperomys leucopus ALLEN, Proc. Bost. Soc. Nat. Hist., XIII, 1869 (1871), p. 192 



(Iowa). 



Peromyscus leucopus noveboracensis JACKSON, Bull. Wis. Nat. Hist. Soc., VI, 1908, 



p. 21 (Wisconsin). HAHN, Ann. Rept. Dept. Geol. & Nat. Resources Ind., 



1908 (1909), p. 497 (Indiana). OSGOOD, N. A. Fauna, No. 28, 1909, p. 117 



(Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Missouri, Wisconsin, 



etc.). WOOD, Bull. 111. State Lab. Nat. Hist., VIII, 1910, p. 539 (Illinois). 



Type locality New York. 



Distribution Northern United States, Nova Scotia and a small 



portion of southern Ontario, west to Minnesota, south to Missouri, 



south-central Illinois and Indiana (where it intergrades with P. 



leucopus), eastern Tennessee and Virginia. (See map.) 

 Description Similar to P. leucopus but averaging slightly larger and 



somewhat paler; fur somewhat longer and softer. 

 Measurements Total length, about 7 in. (178 mm.); tail vertebrae, 



about 3 in. (76 mm.); hind foot, .87 (22 mm.). 



The Northern White-footed Mouse is normally an inhabitant of the 

 woods, although in summer it is often found in pastures where there are 

 bushes and stumps. Old corn shocks are favorite resorts of these 

 Mice, but they are not commonly found at any great distance from 

 timber-land of some sort; although Snyder states that he has "taken 

 them in traps in grassy fields a mile from any timber" (I. c., p. 117). 

 It builds its nest under logs or in an old hollow log or pile of brush, 

 and again in bushes. I have found several of the latter, none of which 



