462 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



adult cozumelae on the basis of its juvenile characters — smaller size; 

 darker, less ornate coloration; and bulging braincase. Apparently 

 bennettii and cozumelae are very similar, but until adult specimens of 

 each are compared, their true relationship cannot be determined. 



Four species have been named in Anthorhina, but all seem to have 

 been based on distortions of preservation or individual, seasonal, or 

 geographic variations of a single species. Crenulation and hairiness 

 of the noseleaf are individually variable throughout. The wings 

 apparently are always inserted on the distal portion of the metatarsus, 

 but this feature may be obscured by labels tied to the ankle. The 

 calcar varies individually and geographically, and often is difficult to 

 measure accurately in preserved specimens. Coloration varies with 

 age and season, as well as geographically. Coloration of the fresh 

 adult pelage approximates black and white, but with age these colors 

 became progressively obscured with yellow, orange, and reddish. 

 Juveniles are duller, blacker, and have less prominent markings than 

 adults. Crowding of the maxillary tooth row is individually variable. 

 Size of the ears in dried specimens depends to some extent on the 

 conditions of drying. 



The genus Mimon includes the following: 



Mimon bennettii Gray: Type locality Ipanema, Sao Paulo, Brazil; 

 and Mimon cozumelae Goldman: Type locality Cozumel Island, 

 Quintana Roo, Mexico, diagnosis: Body size large (forearm aver- 

 ages 55 mm.) ; coloration pale brownish, unmarked except for whitish 

 postauricular patches; fur long and woolly; ears very large; noseleaf 

 plain, naked; anterior upper premolar (P 1 ) about equal to inner upper 

 incisor (I 1 ) in size; lower incisor longer than wide; auditory bullae 

 small; zygomata fragile, specimens examined: M. bennettii: Brazil: 

 Ipanema, Sao Paulo, 1, USNM. M. cozumelae: Mexico: Cozumel 

 Island, Quintana Roo, 1, MCZ, 2 including type of cozumelae, USNM; 

 Izamel, Yucatan, 2, USNM. 



Mimon crenulatum crenulatum E. Geoffroy St. Hilaire: Type locality, 

 Brazil. 1 diagnosis: body size small (forearm averages 50 mm.) ; dorsal 

 coloration blackish-brown, marked with whitish postauricular patch and 

 median dorsal stripe, both varying from fairly prominent to obscure; 

 fur medium-long, lax; underparts whitish to rusty, bases of hairs 

 grayish ; cars large ; noseleaf more or less crenulated on margins toward 

 the base, fringed with long hairs; P 1 about equal to I 2 in size; lower 

 incisor as wide as long; auditory bullae large; zygomata stout; rostrum 



1 Cabrera (1958, p. 66) further restricted the type locality to Bahia, hut in view of the uncertainty of the 

 distribution of variation in the species in eastern Brazil, the restriction appears premature and perhaps 

 detrimental. Present indications are that the subspecies crenulatum occurs at least from eastern Venezuela 

 and Trinidad to the lower Amazon. 



