FEB., 1912. MAMMALS OF ILLINOIS AND WISCONSIN CORY. 251 



that long member, for its whole length, through the mouth from side 

 to side, beginning near the body and ending at the tip. At night as 

 soon as the lights were put out the mouse began gnawing the paper, 

 and during the night it gnawed all the newspapers it could reach, and 

 made the fragments and the cotton into a large nest perhaps five or 

 six inches in diameter, and established itself in the centre. Here it 

 spent the succeeding day. The next night it was supplied with more 



Map illustrating approximate distribution of the Jumping Mice belonging to the genus Zapus 

 in eastern United States. 



Zapus hudsonius (ZIMMERMANN). Type locality Hudson Bay. Description as 



previously given. 



Zapus h. campestris PREBLE. (N. Amer. Fauna, No. 15, 1899, p. 20.) Type lo- 

 cality Bear Lodge Mountains, Wyoming. Similar to hudsonius but slightly 



larger, brighter in color and brain-case higher. 

 Zapus h. americanus (BARTON). (Trans. Amer. Philos. Soc., IV, 1799, p. 115.) 



Type locality Near Philadelphia, Penn. Smaller than hudsonius, with color 



of dorsal area less distinctly marked. 

 Zapus h. ladas BANGS. (Proc. N. Eng. Zool. Club, I, 1899, p. 10.) Type locality 



Rigoulette, Hamilton Inlet, Labrador. Larger and darker than hudsonius-, 



with longer tail and hind foot. 



