1917.] 



Lang and Chapin, Field Notes on African Chiroptera. 



555 



63. Mops niangarse sp. nov. 



Compared with Mops midas, which it nearly equals in size, this species 

 shows very definite external characteristics. Its relatively small ears do 

 not join across the forehead; but it can boast of a crown that starts from the 

 short-haired nape and, becoming gradually longer, stops abruptly where 

 the interaural membrane would be in related species, some of which, as 

 Choerephon (Lophomops) chapini, bear an erectile crest on the back of this 

 movable skin (p. 462). 



The upper side is hazel-brown, the under side buffy brownish with a 

 yellowish tinge on the breast and on the lower side of the neck. It attains 

 a length of 4.9 inches (125 mm.), the dark wings have an expanse of 16.8 

 inches (426 mm.). 



It is one of the many species that live in hollow trees and probably will 

 be found to occur elsewhere in the more open country of the northern Uele. 



64. Mops trevori sp. nov. 



Plate XLVIII, Fig. 2. 



At Faradje in September, half a dozen of these bats flew back and forth 

 so rapidly that we thought shooting one in the dim moonlight more difficult 

 than securing some of the fast-flying swifts and almost impossible. But 

 challenged thus, Chapin brought down one which has proved to be new to 

 science. Only a little smaller than Mops midas, it has a length of 4.15 

 inches (105 mm.) with a wing-spread of 15.1 inches (384 mm.). Above it 

 is chestnut-brown with a distinct bloom; below a light grayish brown tint 

 is predominant, with white hairs especially numerous on throat and breast. 

 Behind the aural membrane it has a crest of coarse, slightly curved hair 

 growing in bunches, but the surrounding ordinary hair is also considerably 

 lengthened. Its stomach contents showed that it fed on good-sized Coleop- 

 tera. It also had a very large embryo. 



65. Mops (Allomops) osborni sp. nov. 



Text Figs. 12-14 (pp. 470 ff.) and 26. 



Between the species of Molossidse with a large tuft of hair on the back 

 of the interaural membrane, like Choerephon {Lophomops) chapini, and 

 those that lack it completely, there are several intermediate forms, includ- 

 ing the present, where there is a distinct but short dark brown tuft more 



