460 



Bulletin American Museum of Natural History. [Vol. XXXVII, 



at the base of the penis, mentioned as a distinctive feature of the unique 

 type of demonstrator. 



57. Ch«rephon sp. indet. 



One specimen, semiadult male, skin and skull, Avakubi, Dec. 28, 1913. 



Collectors' measurements : Total length, 109 mm. ; head and body, 71 ; 

 tail, 38; foot, 12; ear, 22. Forearm, from skin, 48; skull, total length, 

 20.4; zygomatic breadth, 10.5. 



Color above russet; underparts ochraceous tawny. Ears and wing 

 membranes wholly blackish brown; limb-bones blackish above, whitish 

 below. 



Evidently fully adult as regards coloration and other external features, 

 except that the phalangeal epiphyses are still free, the outer milk incisors 

 and the right milk p 2 are still present, and the frontal bones are not united 

 on the midline, but the rami are firmly joined. The cranial and external 

 measurements are consequently somewhat below normal adult size. 



This specimen is possibly referable to Nyctinomus aloysii-sabaudice 

 Festa, from Torro, Ruwenzori, but this species is not identifiable from the 

 description given, no mention whatever being made of the skull, and the 

 coloration is given simply as clear chestnut ("castagno chiaro" = russet 

 del Ridgway"), the hairs lighter basally, with no indication that the under- 

 parts are lighter than the back, or ochraceous tawny, as in the present speci- 

 mens. The measurements would apparently agree with an adult example 

 of the present form. Geographical considerations, however, indicate that 

 the two forms should not be closely related. 



The nearest species to this specimen in the present Congo Collection is 

 Cheer ephon russatus, from Medje, from which it differs in being much larger, 

 and strikingly different in coloration. 



Lophomops subgen. nov. 

 Text Figs. 9-11. 



Type Chcerephon (Lophomops) chapini sp. nov. 



Skull and dentition as in the smaller species of Chcerephon, but outer lower incisors 

 often deciduous, giving an incisive formula of jEj instead of ~~. 



Ears united in front by a deep membrane, from the back of which arises a heavy 

 crest of long straight hairs, occupying the whole posterior face of the membrane and 

 rising above the tops of the ears as a broad frontal transverse crest, the hairs of which 

 are dark brown for the basal half and lighter brown or (in one of the species, selected 

 as the type) white for the apical half. It is apparently a sexual character, but only 

 males have thus far been examined except in the rather aberrant C. (L.) abce. For 



