176 VESPERUS MELANOPTERUS. 



Description of the new West-Indian Bat: 

 Vesperus mélanopterus, n. sp. 



The type-specimen is an alcoholic fuUgrown female. 



Ears laid forwards the tips do extend not farther than 

 the eyes ; internal basal lobe sharply pointed about half 

 way the tragus, rounded at its base with a slow bow to 

 the rounded off tip ; outer margin witli a nearly imperceptible 

 emargination beneath the tip, ending near the angle of 

 the mouth in a small hairy lobe; tragus rather attenuated, 

 inner margin straight, outer margin slightly curved, with 

 a sloping excavation opposite its base. 



Thumb and feet small; wings to the base of the toes. 

 Tail ending in a well developed projecting tip. Termination 

 of calcaneum indistinct, with a narrow cutaneous margin. 



Fur above sooty brown light brown tipped, beneath 

 base of hairs black, the extremities white ; wings black. 



Outer upper incisors very small, scarcely perceptible 

 without the aid of a lens, crushed in between the canines 

 and the inner incisors; the latter more than half the size 

 of the canines, bicuspidate, anterior cusp the highest. Lower 

 incisors deeply trifid, placed rather across of the jaws. 

 Upper premolar very developed, much more than half the 

 size of the strong canine ; lower premolars crowded, the 

 first not half the height of the second premolar, which hardly 

 exceeds the anterior lower molar in vertical extent. 



Dentition ^ H~ T "l~ ~ ~t~ Y' °^"'- 



ear 12.5 



tragus 6 



forearm 40 



second finger . . . . 37 -|- 4 = 41 

 third » 39 -f 15 + 13 + 7 = 74 



fourth » . . 37 + 13 -f 10 = 60 

 fifth » . . 37 + 9 + 7 = 53 



tibia 16 



tail 43 



Habitat: Dutch West-Indies, Surinam, Paramaribo. 



Notes from the Leyden IMuseura , Vol. XXIV. 



