66 



VESPERTILIONID^. 



the tibia, leaving the foot free, a character which at 'once 

 distinguishes it from all other British species of the 

 genus Vespertilio as restricted in this work, Interfenioral 

 membrane ample ; the transverse lines, as in V. mysta- 

 dnus, very numerous. Fur soft, plentiful, brownish 

 black at the base; the surface reddish brown above, 

 sometimes dark brown and occasionally dark greyish 

 brown, ash-grey beneath : younger individuals are usually 

 darker, sometimes almost black. Membranes dusky, 

 with a reddish tinge ; the interfemoral whitish beneath. 

 Dimensions : — 



Length of the head and body 



,, of the head 



, , of the tail 



,. of the ear 

 Breadth of the ear 

 Length of the tragus 



,, of the fore-arm 

 Extent of the wings . 



Dentition :- 



C. i P.M. 6 M. 



