214 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 



Specimens examined : Boca de Cupe, I ; Bohio, 4 ; Boqueron, 3 1 ; 

 Bugaba, 1 2 ; Cana, 1 ; Chepigana, 1 1 ; Cituro, 1 1 ; Culebra, 2 3 ; Gatun, 

 1; Real de Santa Maria, 3 1 ; .San Pablo, 1 ; Tabernilla, 2; Taboga 

 Island, 1 ; Tacarcuna, 2 ' ; Tapalisa, 3. 1 



MYOTIS sp. indet. 



An alcoholic specimen, with skull removed, in the Museum of 

 Comparative Zoology, from San Pablo, Canal Zone, belongs to a 

 widely ranging group which Mr. Gerrit S. Miller, Jr., informs me 

 includes Myotis ynmanensis, Myotis albescens, and other geographic 

 races in both North and South America. The example differs from 

 M. yumanensis in the dark color of its pelage, but the skull is not 

 very obviously unlike those of several currently recognized species, 

 and in the present unrevised condition of the genus the specimen 

 cannot satisfactorily be determined. The forearm measures 36.4. 



Genus EPTESICUS Rafinesque 

 The broad, naked membranes combined with larger size (forearm 

 about 40 millimeters or more) suffice to distinguish members of the 

 genus Eptesicus from other Panama representatives of the family. 

 The skull is flatter with broader, heavier rostrum than that of Myotis 

 and more nearly resembles that of Rhoge'essa in form. As in Myotis, 

 and unlike Rhoge'essa, two pairs of upper incisors are present, but a 

 departure from the Myotis formula results from the reduction of the 

 upper premolars to the single pair present in Rhoge'essa. The teeth 

 are 32 in number. Two species are known to occur within our limits. 



EPTESICUS PROPINQUUS (Peters) 



Peters' Black Bat 



Vesperus propinquus Peters, Monatsber. k. preuss. Akad. Wissensch. Berlin, 

 1872, p. 262. Type from Santa Isabel, Guatemala. 



This rather small, dark brown, slenderly formed species bears a 

 general external resemblance to Myotis nigricans, but is considerably 

 larger. The forearm measures about 41 millimeters. 



The specific distinctness of this bat from Eptesicus fuscus 

 (Beauvois), with which it had been subspecifically associated, has 

 been pointed out by Osgood. 4 It is smaller and differs otherwise 



1 Collection Amer. Mus. Nat. Hist. 



2 Collection Mus. Comp. Zool. 



s One in collection Amer. Mus. Nat. Hist. 



*Proc. Biol. Soc. Wash., Vol. 27, p. 101, May 11, 1914. 



