KEY TO GENERA. 



I. Bats with median appendage to nose, fonrincisors iulowerjaw. . .Phyllostomid^. 



a. Body massive, auricle shorter than head, not united with its i'ellow . . Artibeus. 



aK Body slender, auricle as large or longer than head, united with its fellow 



Macrotus. 



II. Bats without median appendages to nose. 



b. Nostrils circular, wings narrow and pointed; tail long, produced far beyond 

 interfenioral membrane ; marginal toes fringed with coarse hair.MoLOSSi. 



Lips grooved Xi/ctinomns. 



Lips not grooved Promops. 



b\ Nostrils elliptical, wings broad, ample; tail as long as, or slightly longer 



than, the broad interfemoral membrane ; marginal toes naked 



VespertilionidyE. 



c. Two incisors in upper jaw. 

 t Six incisors in lower jaw. 



* Interfemoral membrane more or less hairy. 



Premolars - Dasypterus. 



o 

 Premolars |^ Atalapha. 



* * Interfemoral membrane not hairy Nycticejua. 



1 1 Four incisors in lower j aw An trozous, 



c'. Four incisors in upper jaw\ 



t Premolars ■, greatest width of tragus at base equals one-half of iimer 

 border Addon yderis. 



I I Premolars ^. 



* Greatest width of tragus equals much less than one-half inner border; 



nose simple, ears separate J'esperuf/o. 



** Greatest width of tragus equals one-third height of inner border; 



auricles united. 



^ Nose with lateral club-shaped gland-masses Corynorhinua. 



§ § Nose without lateral club-shaped gland-masses Euderma, 



2 



I I I Premolars - ; greatest width of tragus at middle and equals two-thii'ds 



height of inner border Lasionycferis. 



1 1 1 1 Premolars ^. Lips whiskered, dorsum of face furred Ve82}ertilio, 



32 



