no. S634 ARDOPS — JONES AND SCHWARTZ 5 



Comparative Zoology, Harvard (MCZ); Joseph C. Moore, Field 

 Museum of Natural History (FM). Specimens in the Museum of 

 Natural History of The University of Kansas (KU) and the collection 

 of Albert Schwartz (AS) also were used. J. E. Hill of the British 

 Museum (Natural History) (BMNH) kindly provided measurements 

 of the holotypes of Ardops nichollsi and A. montserratensis. We are 

 grateful also to Horton H. Hobbs, Jr., and other officials of the 

 Smithsonian Institution for allowing one of us (Jones) to participate 

 in March and April of 1966 in the Bredin-Archbold-Smithsonian 

 Biological Survey of Dominica. 



Ardops nichollsi nichollsi (Thomas) 



Stenoderma nichollsi Thomas, 1891, p. 529. 

 Ardops nichollsi. — Miller, 1906, p. 84. 



Holotype.— Adult female in spirits, skull removed, BMNH 

 91.5.14.4, from unknown locality on Dominica, Lesser Antilles. 



Distribution. — Known only from Dominica (see fig. 3). 



Measurements. — Average and extreme external measurements of 

 six males, followed by those of seven females, are: total length 63.8 

 (60-67), 67.1 (62-73) ; length of hind foot 15.5 (15-16), 15.1 (13-16); 

 length of ear 17.4 (16-18), 17.7 (17-18) ; length of forearm (eight males 

 averaged) 43.6 (42.5-44.9), 46.2 (44.9-48.8). The forearm of the 

 female holotype measures 45.7. Weight of five males averaged 16.9 

 (15.1-18.5); two nonpregnant females weighed 18.3 and 18.7 (lac- 

 tating), and four pregnant females averaged 22.8 (17.8-25.2). 

 See table 1 for cranial measurements. 



Remarks. — Representatives of A. n. nichollsi are the smallest of 

 the species, save for one bat from St. Vincent that tentatively is 

 referred to the subspecies A. n. luciae. The remarkable sexual di- 

 morphism in size seen in specimens from Dominica — no overlap, for 

 example, when length of forearm is plotted against length of skull 

 (see fig. 1) — evidently is shared at least with the population occurring 

 on Martinique, but dimorphism may not be so marked in other races 

 of the species. 



Color, as described earlier, seems not to vary with sex but varies 

 individually in specimens at hand from dark brown to yellowish 

 brown, the palest specimen, a female, being notably paler than any 

 of the others and possibly in worn pelage prior to the onset of molt. 

 At any rate, using a Photovolt 610 Photoelectric Reflection Meter, 

 the reflected values of red, green, and blue on dorsum and venter, 

 respectively, of 13 skins of A. n. nichollsi are: red 15.3 (11-22), IS. 6 

 (15-24.5); green 6.3 (4-11), 10.0 (7-15); blue 5.6 (4.5-8), 8.8 (6.5-13). 

 The upper limits for each value are measurements of the unusually 

 pale female. Reflectance readings for the only other museum skin 



