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'lhs. in. t'ths. 



Total length, from . . . 3 to 3 8 



Tail, "... 1 3 " 1 5 



Fore arm, " . • . 1 3 " 1 5 



Tibia, " . . . 7 " 8 



Spread, " . . . 10 " 11 0, Cooper, Clieirop.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 CaroHnensis. Carolina Bat. 



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

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



Specific characters. Dental system ; incisors ?^ ; canines 

 1=1 ; molars 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 Pennejlvania, and is even found at the 

 base of the Rocky Mountains. 



