10-1 MR. R. F. TOMES ON THE GENUS VAMPYRUS. [Mar. 26, 



pyrus soricinus* and V. bidens of Spix, representing respectively the 

 genera Hemiderma and Tylostoma, and the third a small species 

 which had heen previously described by Dr. Gray under the name of 

 Phyllostoma elongatum f , supplying the type for the genus Schizo- 

 stoma. 



These proposed genera, seven in number, are represented by about 

 eight species ; and as I have compared the greater part of them with 

 each other (all save the Lophostoma sylvicolum), I am enabled to 

 give the following analysis of the group. I may premise, however, 

 that I do not assent to all these subdivisions, and bring them for- 

 ward more to show what has been done, than with any view to their 

 adoption. 



Genus Vam pyrus, Geoffroy et Leach. 



A. {Fampyrus, Leach.) 



General form robust; cutaneous system ample. Wings short, 

 broad and rounded ; hinder limbs somewhat elongated ; interfemoral 

 membrane ample. Tail absent. Wing-membranes extending to the 

 base of the toes. Ears large and ovoid ; tragus small and pointed. 

 Nose-leaf simple and pointed, its margin free all round, the anterior 

 or horse-shoe part not divided from the posterior or elevated part. 

 Lower lip with a reflex front, which is divided in half by a vertical 

 cleft. 



Dentition. — Incisors ^ ; premolars ^. 



First upper premolar smaller than the second, not compressed. 

 First and second lower premolars equal in size, not compressed, 

 and smaller than the third. 

 Ex. Vampyrus spectrum. 



B. {Vampyrus, subgen. Lophostoma, Peters.) 



General form as in Vampyrus spectrum, but the hinder limbs much 

 shorter. Wings very broad, short and rounded. Ears very large, 

 and regularly oval. Wing-membranes extending to the roots of the 

 toes ; interfemoral membrane ample. Tail as in Phyllostoma has- 

 tatum. 



Dentition. — Incisors -| ; premolars ^. 



First upper premolar much smaller than the second, not com- 

 pressed. 



First lower one much larger than the second, which is very small, 

 rounded, and placed inside the line of the other teeth, so as to be in- 

 visible outwardly. 



Ex. Vampyrus auritus, Peters, (PI. XVIII.) 

 Lophostoma sylvicolum of the Ley den Museum. 



* This species is supposed by Dr. Gray to b3 the same as the Phyllostoma bre- 

 vicaudumoi Pr. Wax. Hemiderma, Gerv., is identical with Carollia, Gray. 

 t Tills is quite distinct from the Phyllostoma elongatum of M. Geoffroy. 



