A MONOGRAPH OF THE BATS OF NORTH AMERICA. 



79 



femoral membrane of moderate size; termination of calcar with inter- 

 femoral soiiR'wliat abrupt; the ])oint of tail exserted. 



Coloration subjeet to little variation, tliat of the back daik ])luinbeous 

 at base, with dark or lij;htisli olive-brown tii)s; that of the belly lighter 

 at tip — exhibiting a whitish gray or yellowish gray appearance. The 

 color is thus similar to that of V. f/ri/pJius. 



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 subspecies. 



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

 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. gryphnu Incifuijus. 



The specimen, numbered 5538, from the east of Colville, Northwest 

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

 border of the iiiterfemoral membrane fringed witli stitf 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 mem- 

 brane attached to the ankles — the foot being entirely free. In other 

 respects both agree with T'^. (jryphus lucifugus. 



I have thought it necessary to thus briefly indicate these two aberrant 

 i^di^'iduals, without giving any separate account of them. Shoukl 

 future collections bring forward any others having the same peculiarities 

 as the above. 



Measurements from fifst edition of Monograph,. 



