l86 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



waterfall when heard at a distance. The cave contained several tons 

 of guano, mainly the product of this species. Several smaller 

 colonies of these bats were encountered in neighboring caves. 



An aggregation of perhaps 100 of the same species was located in 

 a small cave on the rocky sea shore a short distance west of the Pacific 

 entrance to the Panama Canal at Balboa. Here the bats were cling- 

 ing in clusters in dimly lighted cavities from which, when dislodged 

 by shooting, some fell into the sea. One of the latter, bobbing about 

 in the rough water, was only partially disabled as I learned when, on 

 reaching for it from a boat, a canine tooth was instantly driven 

 through the middle of the nail of my index finger. In other parts of 

 the same cave were a few Hcmidcrma perspicillatum astecum and 

 Glossophaga soricina leachii. 



The original description of the Panama form by Dr. Allen (/. c.) 

 was based on six specimens from Boqueron, western Panama. Under 

 the name Phyllost omits hastatus Mr. Miller (1912) has published 

 detailed measurements of an adult male collected at Cabina by August 

 Busck. Anthony (1916, p. 373) records examples from Boca de 

 Cupe, Capeti, Real de Santa Maria and Rio Chilibrillo. Mr. Alston 

 (1879, p. 42) has shown how this species has shared with Vampynts 

 spectrum the false accusation of being a blood sucker, the real cul- 

 prits being the true vampires, Desmodus and other genera. 



Specimens examined : Balboa, 20 ; Boca de Cupe, 4 1 ; Boqueron, 

 6 1 ; Cabima, 1 ; Capeti, 4 1 ; Panama (city), 1 ; Real de Santa Maria, 

 8 1 ; Rio Chilibrillo (Chilibrillo cave, near Alhajuela), 42/ 



Genus TRACHOPS Gray 

 In the genus Trachops the lips and chin are conspicuously studded 

 with conical or cylindrical wart-like protuberances, Avhich distinguish 

 it at a glance. The short tail projects from the large interfemoral 

 membrane. The skull in general form is somewhat similar to that 

 of Vampyrus, but less angular. The median lower premolars are 

 very small and crowded inward out of line much as in Macrophyllum. 

 The teeth are 34 in number. 



1 Collection Amer. Mus. Nat. Hist. 



* Nine in collection Amer. Mus. Nat. Hist. 



