460 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



Museum of Natural History (AMNH), Academy of Natural Sciences 

 of Philadelphia (ANSP), Chicago Natural History Museum (CNHM), 

 and Harvard University Museum of Comparative Zoology (MCZ) for 

 allowing me to study specimens under their care. 



Capitalized color terms in the following descriptions are from Ridg- 

 way (Color Standards and Color Nomenclature, 1912). All measure- 

 ments are in millimeters and are explained in Handley (1959, pp. 98-99). 



Mimon crenulatum keenani, new subspecies 



Holotype: USNM 311951, adult male, skin and skull, collected 

 August 25, 1959, by C. M. Keenan, Fort Gulick, Panama Canal Zone, 

 original number 4127. 



Distribution: Central Panama to northwestern Venezuela and 

 western Ecuador. The Panamanian specimen was found in the day- 

 time hanging on the outside of a decayed hollow stump in a sparsely 

 wooded area. The Ecuadorean specimens likewise were taken in a 

 hollow rotted tree stump in a wooded area (Tate, 1931, p. 250). 



Description: Dorsum bright mahogany brown (between Carob 

 Brown and Black); individual hairs monocolored from base to tip; 

 prominent j T ellowish-white median stripe from forehead to base of 

 tail; large prominent yellow-orange spots at posterior bases of ears. 

 Underparts orangish, individual hairs fuscous at base. Membranes 

 and ears blackish. Noseleaf hairy, slightly crenulated at base; wing 

 membranes attached to metatarsus; calcar long. Rostrum relatively 

 long, shallow, and dorsally flattened; sagittal crest relatively low; 

 posterior extension of palate relatively long and broad; molariform 

 teeth broad and massive. 



Measurements: See table 1. 



Comparisons: Brighter and more ornate than the contiguous races 

 crenulatum and longijolium. Rostrum longer and slightly deeper, 

 posterior palatal elongation longer and broader, teeth larger, and 

 calcar longer than in crenulatum. Rostrum shallower and dorsally 

 flatter than in longijolium. 



Remarks: The nominal genera Anihorhina and Mimon are not 

 distinguishable even as subgenera. The bats of Anihorhina differ 

 from those of Mimon principally in having a smaller anterior upper 

 premolar (P 1 ); shorter lower incisor; larger auditory bulla; stouter 

 z}^gomatic arch; shorter, less woolly fur; smaller ears; and hairy 

 noseleaf. 



It is doubtful that either of the nominal genera contains more than 

 a single species. Dalquest (1957, p. 45) cleared up some of the con- 

 fusion surrounding the supposed species M. bennettii and cozumelae, 

 presently known only by a few specimens from Brazil and Mexico, 

 respectively. Dalquest failed, however, to note that his only speci- 

 men of bennettii was a juvenile, and that he distinguished it from his 



