56 



NORTH AMERICAN BATS. 



Coloration subject to little variation, that of the back dark 

 plumbeous at base, with dark or lightish olive-brown tips ; that 

 of the belly lighter at tip — exhibiting a whitish gray, or yellow- 

 ish gray appearance. The color is thus similar to that of T'. 

 subulafus. 



Dentition as in V. evotis. 



The narrow blunt ear, short face, and the elevation of the 

 nostril above the free margin of upper lip are the characters 

 which serve to distinguish this species. 



V. dauhentonii, of Europe, bears some resemblance to this 

 species in the shape of the ear and tragus ; but it is dissimilar in 

 the whitish color of fur beneath, and in the attachment of the 

 wing membrane to foot, which is here joined to the ankle instead 

 of the base of the toes as in V. lucifugus. 



The specimen, numbered 5538, from the east of Colville, X. W. 

 Territory, has a pointed tragus, and the middle part of the free 

 border of the interfemoral membrane fringed with stiff hairs. The 

 fur of the body is silvery beneath, blackish above, back of feet not 

 hairy. Another form from St. Louis, Mo. (Cat. No. 5344), has 

 the wing membrane attached to the ankles — the foot being entirely 

 free. In other respects both agree with V. luci/ugus. 



I have thought it necessary to thus briefly indicate these two 

 aberrant individuals, without giving any separate account of 

 them. Should future collections bring forward an}" others having 

 the same peculiarities as the above, they may possibly then be 

 tliought worthy to receive specific names. 



Hab. — Quite common, and universally distributed throughout 

 the United States, and south to the Isthmus of Panama. 



Measurements. 



