474 



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



9 20.7; condylobasal length, 19.6, 9 18.6; zygomatic breadth, 13.4, 9 12.6; 

 mastoid breadth, cf 12.2, 9 11.8; breadth of braincase, & 10.4, 9 9.9; interorbital 

 breadth, d 71 4.4, 9 4.5; breadth at base of canines, cT 6, 9 5.7; maxillar breadth 

 (between outer borders of m 3 ), cf 9, 9 9.2; depth of braincase medially (without 

 the crest), & 7, 9 6.8; upper toothrow (including canine), & 7.7, 9 7.2; length of 

 mandible, <f 15, 9 13.3; angle to condyle, cf 5.2, 9 4; depth at coronoid, d" 4.2, 



9 3.4; lower toothrow (including canine), cf 8.5, 9 8.1. Height of sagittal crest 

 in male, 1.8, in female, 0.5. 



Represented by 2 alcoholic specimens, type (cf) and cotype (9), collected at 

 Kinshasa, 6 miles from Leopoldville, lower Congo, December 22, 1914. 



The only species with which the present form needs comparison is 

 Mops (Allomops) faradjius, which differs from it in smaller size, less highly 

 developed sagittal crest, less concave palate, and in certain other features 

 indicated under M. {Allomops) occipitalis. 



66. Mops (Allomops) occipitalis sp. nov. 

 Text Fig. 15, 



fNyctinomus thersites Thomas, Ann. and Mag. Nat. Hist. (7), XII, p. 364, Dec. 

 1903. Efulen, Cameroons. 



Type, No. 48851, ad. d 1 , skin and skull, Avakubi, Belgian Congo, Feb. 13, 1914; 

 Herbert Lang and James P. Chapin. American Museum Congo Expedition. Orig. 

 No. 2487. 



Pelage short, soft and velvety, about 1.5 mm. in length on the back to about 

 2.5 on the sides of the neck, throat, and sides of body below. External base of ears 

 and whole space between them thickly covered with slightly lengthened glandular 

 black hairs, which also cover the back of the low connecting membrane, but do not 

 rise much above it. 



Fur of upperparts dark chocolate-brown; the sides of the back, the lower back 

 from a line joining the hips posteriorly, and the hind limbs naked and blackish, the 

 central furred portion of the back, from considerably in front of the shoulders to hips, 

 of about the same width as the naked area each side. A scanty fringe of long bristly 

 hairs (blackish or mixed with a few whitish ones) from the hips, directed backward, 

 the longest reaching to or beyond the middle of the uropatagium (scanty or nearly 

 wanting in some specimens). Underparts blackish laterally, the median area buffy 

 brown ; a ventral area (corresponding ventrally with that of the lower back) and limbs 

 naked, pale rusty brown (the denuded space much reduced in some specimens). 

 Ears near together, blackish brown, united by a low membrane which extends for- 

 ward as a swollen obtuse projection reaching nearly half-way to the nose; front 

 and upper border of ears thickened, forming a sharp angle at the anterior inner 

 border; tragus merely a minute dusky point, about 2 mm. in height; antitragus 

 brownish, small, about 4X4 mm., bluntly convex above. Face naked, blackish; 

 nostrils prominent, upper lip weakly corrugated; chin naked, brownish. Wings 

 from middle of tibia. Forearm and membranes naked. Wing membranes above, 

 including antebrachium, blackish brown, lighter, grayish brown apically; below simi- 



