THE FAMILIES AND GENEKA OF BATS. 141 



Remarks. — Though not very well characterized this genus is dis- 

 tinguishable from Anoura by the rudimentary though evident tail, 

 the nearly terete outer upper incisors, and the position of the anterior 

 upper premolars (pm 2 ) close to base of canine. The zygomatic 

 arch though very slender is apparently always present and com- 

 pletely ossified. 



The status of Lonchoglossa wiedi as a member of this genus seems 

 open to much doubt. I have seen no authentic specimens, but the 

 characters given by Peters and Dobson make it appear more prob- 

 ably an Anura, if, indeed, it is specifically separable from A. 

 geoffroyi. 



Genus CHCERON YCTERIS Tsehudi. 



1844. Chceronycteris Tschudi, Weigmann's Archiv. fiir Naturgeschichte, 



1844, I, p. 247. (IS! omen nudum.) 

 1844-46. Chceronycteris Tschudi, Fauna Peruana. Mamm., p. 70 (subgenus 



of Glossophaga) . 

 1868. Ghwronycteris Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 



p. 366 (genus). 

 1878. Chceronycteris Dobson, Catal. Chiropt. Brit. Mus., p. 509. 

 1898. CJicernycteris (sic) H. Allen, Trans. Amer. Philos. Soc, n. s., XIX, p. 

 252. 

 Type-species. — Chmronycteris mexicana Tschudi. 

 Geographic distribution. — Warmer parts of America north to 

 southern Arizona. 



Number of forms. — Four species are now recognized. 

 Characters. — Dental formula : 



-2 3. 1. --34567 . 2-2 1-1 2-2 3-3 

 . 1. -2 345 67*0-0' c l-l' pwl 3-3' m 3-3 -30, 



Upper incisors minute, in pairs, the teeth of each pair in contact 

 with each other but separated from canine by distinct space and in 

 middle by an interval nearly twice as great. Crowns of incisors 

 much longer than high and nearly as wide as long, that of the inner 

 tooth flat and horizontal, that of the outer oblique and with a low, 

 blunt cusp on inner side. Canines and premolars with no special 

 peculiarities, the latter long and narrow, with high main cusp and 

 well-developed styles. Upper molars distinctly spaced, with para- 

 style and metastyle absent, and mesostyle greatly reduced, though 

 indicated in all three teeth, the W pattern therefore barely suggested. 

 The three molars are almost exactly alike in form, but the third is 

 slightly smaller than either of the others. Lower molars with all 

 the cusps present, but, with exception of protoconid, much reduced, 

 the three teeth essentially alike. Skull with rostrum very greatly 

 elongated in some species, in others not unusually so for members of 

 the subfamily. Zygomata incomplete. Pterygoids strongly con- 



