NO. 5 MAMMALS OF PANAMA — GOLDMAN 177 



mens from " Pueblo Nuevo, N. W. Panama," and from Boqucte, 

 Chiriqui. 



The color of the upper parts, described as pure white or gray- 

 mixed, should render this species conspicuous among the bats of the 

 general region. The length of the forearm is 66 millimeters. The 

 species is said to agree in general character with Diclidnrus albus 

 of Brazil, but has differently shaped incisors and premolars. 



Family NOCTILIONIDAE. Bull Dog Bats 



The bats of this family are rather large, with narrow, sharp- 

 pointed ears which, when laid forward, reach about to the end of the 

 nose. The short tail protrudes from the upper side of the inter- 

 femoral membrane. The pelage is short and on the lower part of the 

 back confined to the median portion. There is no nose leaf. The 

 upper canine teeth curve widely apart and project conspicuously over 

 the lower jaws. The elongated middle pair of upper incisors are in 

 contact near the middle, but diverge leaving a deep emargination 

 between their conical points. The outer pair of upper incisors are 

 very short, barely reaching the cingulum of the inner pair behind 

 which they are partially hidden. Two genera are recognized, the 

 typical one, Noctilio, including a large, long-legged, ochraccous- 

 tawny species not yet recorded from Panama, although it probably 

 occurs there. This species is noted for its alleged fish-eating habits. 

 The family is represented on the Isthmus by the genus Dirias. 



Genus DIRIAS Miller 

 The genus Dirias is very similar to Noctilio in general structure, 

 but differs considerably in appearance owing to smaller size, dark 

 coloration and relatively short legs. The skull closely resembles that 

 of Noctilio, but the teeth are more delicate in sculpture and differ in 

 detail. The upper molars are more closely crowded ; instead of 

 forming prominent cusps with distinct commissures the hypocones 

 of the first and second are shelf-like, with trenchant lateral margins 

 connecting with ridges extending upward to protocone and metastyle. 

 The teeth are 28 in number. 



DIRIAS ALBIVENTER MINOR (Osgood) 



Little Bull Dog Bat 



Noctilio minor Osgood, Field Mus. Nat. Hist., Publ. 149, zool. sen, Vol. 10, 

 p. 30, October 20, 191 o. Type from Encontrados, Zulia, Venezuela. 



A Panama specimen of this bat is a very dark shade of brown, or 

 near bone brown (Ridgway, 1912) above, with a faint grayish median 



