10 QUADRUPEDS OF MASSACHUSETTS. 



in depth in different individuals ; ears short, roundish, naked on 

 the anterior half above, and furnished within with merely a thin 

 covering of hairs. 



Description. There is a slight hoary appearance which arises 

 from the cream-colored fur which is intermixed with the reddish 

 tawny. The reddish tawny prevails on the interfemoral mem- 

 brane. Wing membranes naked above, excepting a small spot 

 at the base of the thumb and fore fingers. At the insertion of 

 the wing is a white mark, which is most conspicuous on the under 

 side. Color beneath paler than above. Incisors short, minute, 

 crowded, and rise but little above the gum ; nostrils rounded and 

 surrounded by a swollen border, and grooved superficially, and 

 opening obliquely outwards. 







Dimensions. 







in. t'ths. in. t'ths. 



Total length, 



from 



. 3 to 3 8 



Tail, 



a 



1 3 " 1 5 



Fore arm, 



u 



. 1 3 " 1 5 



Tibia, 



« 



7 " 8 



Spread, 



u 



.10 "11 0, Cooper, Cheirop. U.S. 



Observations. This species is found in Williamstown, and is 

 probably more or less common in this State.* Its dental system 

 is obscure, and hence there has arisen some discrepancy in the 

 descriptions. It varies also in the depth of its color, some in- 

 dividuals being much paler than others. During winter it re- 

 mains in a torpid state, in caverns and similar places. The 

 female is larger than the male, and produces four or five at a birth. 



3. Vespertilio Carolinensis. Carolina Bat. 



Vespertilio Carolinensis, Geoff. St. Hilaire, in Ann. du Museum, viii. p. 193, 

 sp. 2. figs., &c. Le Conte, in App. to McMurtrie's Cuvier, i. p. 441. 



Specific characters. Dental system ; incisors ^- ; canines 

 !=} ; molars f=f ; = 32. Color a uniform brown, approaching 

 to chesnut. Fur beneath yellowish, soft, and glossy, and covering 



* It is also common to New York and Pennsylvania, and is even found at the 

 base of the Rocky Mountain*. 



