GLOSSOPHAGA. 



CHCERONYCTERIS. 



673 



Measurements. "Length of forearm, 38; tibia, 13.5; foot, 9.5; 

 ear, 13.5; length of skull, 22.5; of rostrum from interorbital constric- 

 tion, ii ; width of braincase, 9.2; of rostrum at canines. 4." (Rehn.) 



The bats of the next genus, which conclude the group, are noted 

 for the length of their muzzles, which exceed all those of the other 

 species of the GLOSSOPHAG/E. 



151. ClHEronycteris. 



I-S:C.{E[;P.g;Mt = 36.. 



Choeronycteris " Licht.," Tschudi, Faun. Peruana, 1844, p. 70. 



Type Cheer onycteris mexicana Tchudi. 



Upper incisors in pairs, separated by a wide diastema, inner ones 

 smaller than the outer; molars without W-shaped cusps; first upper 

 premolar absent; zygomatic arch wanting; muzzle long; nose-leaf-as 

 in Leptonycteris; interfemoral membrane large. 



KEY TO THE SPECIES. 



A. Size large; calcaneum shorter than the foot. PAGE 

 a. Forearm 42 mm C. mexicana 673 



B. Size small; calcaneum longer than the foot. 



a. Forearm 39 mm. ; rostrum long C. minor 674 



b. Forearm 33.5 mm.; rostrum shorter C. godmani 674 



FIG. CXVII. CHCERONYCTERIS MEXICANA. 

 ex Dobson, Cat. Chiroptera. 



632. mexicana (Cheer onycteris) , Tschudi, Fauna Peruana, 1844, p. 



72, pi. in, fig. 3. 

 TRES MARIAS ISLANDS BAT. 

 Type locality. Mexico. 



