Fig. 59. Zapus hudsonius. 

 No. 10902 Field Columbian Museum Coll. Enlarged 'A- 



Upper tooth row. Lower tooth row. 



Enlarged 8 times. Enlarged 8 times. 



Geogr. Distr. Hudson Bay south to New Jersey, mountains of 

 North Carolina west to Iowa and Missouri and northwest to Alaska. 



Genl. Char. Medium size; molars and incisive foramina small. 



Color. Sutnmcr Pelage. Above ochraceous lined with black; 

 dorsal stripe darker; beneath white; tail grayish brown above, whitish 

 beneath; feet white. 



Fall Pelage. Sides duller, more yellow, dorsal area indistinct. 



Measurements. Total length, 209; tail vertebrae, 124; hind 

 foot, 20.5. 



a.—ladas. (Za/ius), Bangs, Proc. New. Eng. Zool. Club, i, 1899, 

 p. 10. 



Ty/>e locality. Regoulette, Hamilton Inlet, Labrador. 



Geogr. Distr. Eastern Quebec, north to Hamilton Inlet, Lab- 

 rador. 



Genl. Char. Larger than Z. hudsonius, hind foot and tail longer; 

 color darker; skull and zygomata longer, brain case higher and 

 longer; rostrum longer; bullae longer. 



Color. Summer Pelage. Dorsal area mixed with ochraceous; less 

 conspicuous; sides ochraceous buff; beneath white tinged with buff; 

 tail dusky above, whitish beneath. Feet white. 



Fall Pelage. Above yellowish, dorsal area very indistinct. 



Measurements. Total length, 238; tail vertebra?, 153; hind foot, 32. 



