NO. 5 MAMMALS OF PANAMA GOLDMAN 2IO, 



MOLOSSOPS PLANIROSTRIS (Peters) 

 Flat-nosed Mastiff Bat 

 M[olossus] planirostris Peters, Monatsber. k. preuss. Akad. Wissensch. 

 Berlin, 1865, p. 575. Type from British Guiana. 



Molossops planirostris appears to be mainly South American in 

 distribution, but G. M. Allen (1908, p. 56) directs attention to a 

 specimen collected near the City of Panama by W. W. Brown, Jr., 

 and erroneously referred to Promops nanus by Bangs (1906, p. 212). 

 As Dr. Allen states, " the presence of this species within the limits of 

 Middle America " is thus established. 



Specimens examined: Panama (near city), I. 1 



Genus EUMOPS Miller 

 Among the known Panama Molossine bats the genus Eumops is 

 readily recognizable externally by the connection of the ears across 

 the forehead. The skull is similar in general outline to that of 

 Molossus, but the rostrum is narrower and dental differences are 

 various. The upper incisors project forward far beyond the plane 

 of the canines and an additional pair of outer incisors is present. 

 The basisphenoid depressions are distinct as in Molossus. The teeth 

 are variable in number, 30 being present in the two Panama species. 



EUMOPS NANUS (Miller) 

 Dwarf Mastiff Bat 

 Promops nanus Miller, Ann. Mag. Nat. Hist., Ser. 7, Vol. 6, p. 470, 



November, 1900. Type from Bugaba, Chiriqui, Panama. 

 The dwarf mastiff bat, originally described from western Panama, 

 was not met with by me in the eastern part of the republic. A speci- 

 men collected near the city of Panama by W. W. Brown, Jr., and 

 recorded as Promops nanus by Bangs (1906, p. 212) is referable to 

 Molossops planirostris as pointed out by G. M. Allen (1908, p. 56). 

 As Miller aptly remarked, the species is essentially a miniature of 

 Eumops glaucinus. The forearm measures about 39 millimeters, 

 instead of 59 millimeters as in the latter animal. 

 Specimens examined: Bugaba, 1. 



EUMOPS GLAUCINUS (Wagner) 

 Chestnut Mastiff Bat 

 Dysopes glaucinus Wagner, Wiegmann's Archiv. f. Naturg., 1843, p. 368. 



Type from Cuyaba, Matto Grosso, Brazil. 

 This rather large bat, mainly South American in distribution, was 

 not until recently known to occur in Middle America. It is one of 



1 Collection in Mus. Comp. Zool. 



