VESPERTILIO SEROTINUS. 11 



transparent, a spur or tendinous process running from the 

 heel along the margin of the interfemoral membrane, and 

 tending to stretch it ; margin between spur and tail puck- 

 ered and set with short bristly hairs ; free portion of tail 

 very short; hinder claws very strong, with long hairs; 

 thumb smaller than in V. Bechsteinii. Pur long and silky, 

 light rufous brown approaching to reddish grey above, the 

 tips of the hairs being of this colour, the roots dusky brown; 

 beneath, silvery grey at tips, black towards the roots ; ears 

 yellowish grey, especially within, towards the base ; tragus 

 yellowish ; interfemoral membrane paler than wings. Fe- 

 male more reddish above than male. The general colour 

 of this Bat is lighter than that of most others. 



Length of head and body, 1 inch 11 lines ; head, 8-| lines; 

 tail, 1 inch 7 lines ; ears, 8-^- lines ; tragus, 5 lines ; breadth 

 of ears, 3f lines ; tragus at base, 1 line ; length of fore- 

 arm, 1 inch 6 lines ; thumb, 2| lines ; extent of wings, 

 10 inches 8 lines. 



Very local in England and Ireland. In Belgium, M. 

 de Selys Longchamps has found it in the quarries of 

 Maestricht and near Brussels. M. Holandre has obtained 

 it near Metz in hollow trees. Professor Blasius, in se- 

 veral parts of Germany, in Hungary, Gallicia, and Central 

 Bussia. 



Vespertilio serotinus. 



Vespertilio serotinus, Desm. Mamm. Sp. 205 ; Bell, Brit. Quad. ; 

 Temm. Monog. vol. ii. p. 175 ; Bdoh. Faun. Ital. (figured). 



Description. — False molars " 2 "^2 • -^ ace aim 08 * naked ; 

 muzzle very short, broad, and obtuse ; ears oval-triangular, 

 shorter than the head, hairy outside at base, naked above ; 

 tragus semieordate, somewhat elongated, pointed. Fur in 

 the male, deep chestnut-brown above, passing beneath into 

 yellowish grey ; in the female, much brighter ; hair long, 



