NO. 5 MAMMALS OF PANAMA — GOLDMAN I79 



not extend far into the interfcnioral membrane ; in various genera no 

 external tail is discernible and its absence may be associated with a 

 deep emargination of the posterior border of the interfcmoral mem- 

 brane. Among structural details distinguishing the family are the 

 presence of three completely ossified phalanges in the third finger 

 and the entire premaxilla. The molar teeth are well developed, but 

 exhibit wide diversity of form in the various subfamily divisions. 



Subfamily CHILONYCTERINAE 



Genus CHILONYCTERIS Gray 



Unlike most members of the family, I'hyllostomidac, the genus 

 Chilonycteris lacks a nose leaf and the well-developed tail projects 

 through and overlaps the upper surface of the interfcmoral mem- 

 brane. The ears are long with j^ointed tips directed slightly back- 

 ward. The braincase is subglobose, owing largely to the very 

 narrow interorbital constriction. T+ie rostrum is depressed above 

 near base, and somewhat upturned anteriorly, the nasal opening 

 circular and directed forward. The teeth are 34 in number. 



CHILONYCTERIS RUBIGINOSA RUBIGINOSA Wagner 



Dark Brown Bat 



Chilonycteris ruhiginosa Wagner, Weigmann's Arch. f. Naturg., IX, Vol. i, 

 p. 367. Type from Cai(;ara, Matto Grosso, Brazil. 



In general color this bat is dark brown, or warm sepia (Ridgway, 

 191 2). The pelage is rather long and directed forward over the 



Fic. 4. — Chilonycteris rubiginosa rubiginosa. 

 No. 1/9754, U. S. Nat. Mus. About nat. size. 



head from a hair-whorl on the bact of the neck. The face is well 

 haired and elongated tufts project from the sides of the muzzle. 

 The forearm measures about 62 millimeters. Typical Chilonycteris 

 rubiginosa is replaced in southern Mexico by the smaller form, 

 C. r. mexicana. 



Specimens collected by August Busck in the Chilibrillo caves, near 

 Alhajuela, in April or May, 191 1, have been recorded by G. S. Miller, 

 Jr. (1912, p. 23); examples from the same place are recorded by 



