4 PROCEEDINGS OF THE NATIONAL MUSEUM v«>l. 124 



the wing with the body in all specimens that we examined (but see 

 account of A. n. montserratensis) and is somewhat better developed 

 in females than in most males. The ears are brownish in museum 

 skins and contrast little with the color of the dorsum. The tragus 

 and basal parts of the ear, tinged with greenish yellow in life, are 

 yellowish or yellowish brown in dried skins. The membranes are 

 dark brownish, contrasting to a greater or lesser degree with the color 

 of the dorsum. Ventrally, the pelage usually is a rich brownish, 

 tinged with grayish white; the hairs of the venter lack the tricolored 

 appearance of those on the dorsum. Some photoelectric reflection 

 readings of pelage colors are given in the account of A. n. nichollsi. 

 Bats of the genus Ardops evidently roost exclusively in trees and 

 other types of arborescent vegetation although little precise informa- 



nichollsi 



montserratensis 



Figure 2. — Dorsal view of crania illustrating extent of secondary sexual variation: Ardops 

 nichollsi nichollsi (one of smallest males examined, AS 5342; one of largest females, KU 

 104807); A. n. montserratensis (male, C. E. Ray 7926; female, CER 7927). Overall 

 infraspecific variation in cranial size also is illustrated by fact that A. n. nichollsi is smallest 

 subspecies of species and A. n. montserratensis is largest. 



tion currently is available concerning their natural history. Those 

 few observations that have been made are mentioned in the accounts 

 of the several subspecies, particularly under A. n. nichollsi of Dom- 

 inica. Much remains to be learned, too, of distribution and variation 

 in Ardops, and we hope this synopsis will provide a useful basis for 

 future work. 



All measurements cited in text are in millimeters and all weights 

 are given in grams. For the loan of specimens or for allowing us to 

 study material housed in the institutions mentioned (abbreviations 

 used to identify specimens in text are in parentheses), we are in- 

 debted to the following: Charles O. Handley, Jr., and Gary L. Ranck, 

 U.S. National Museum (USNM); Karl F. Koopman, American Mu- 

 seum of Natural History (AMNH) ; Barbara Lawrence, Museum of 



