1917.] 



Allen, Lang and Chapin, Bats from the Belgian Congo. 



473 



65. Mops (Allomops) osborni 1 sp. nov. 

 Text Fig. 12-14, and 26. 



Type, No. 49230, & ad. (in alcohol), Kinshasa (near Leopoldville), Belgian 

 Congo, Dec. 22, 1914; cotype, No. 94244, 9 ad. (alcoholic), same locality and date. 

 Herbert Lang and James P. Ghapin. 

 American Museum Congo Expedition. 

 Orig. No. of type, 2570. 



Upperparts dark hair-brown with 

 a grayish sheen, the hairs whitish at 

 extreme base; underparts, sides paler 

 brown than back, the hairs grayish- 

 tipped, the central area from chest 

 posteriorly broadly white, throat and 

 an indistinct pectoral band grayish 

 brown; wing membranes and limb 

 bones above dark brown, below lighter, 

 becoming whitish toward the body, in- 

 cluding the propatagium and a narrow 

 posterior edging; uropatagium dark 

 brown above, whitish below; ears united 



by a deep band, the back of the mem- male type, to show the small crest on back of 



brane (in both sexes) covered with frontal membrane, f. 

 lengthened hair-brown hairs which 



barely reach its upper border (Fig. 14). Tragus minute; antitragus small (about 

 4X4 mm.), evenly rounded above. Sides of back, lower back and hind limbs 

 above naked and dark brown; under side of limbs and anal region naked and yel- 

 lowish white. Face dark brown; upper lip heavily corrugated. No gular pouch 

 in either sex. Feet heavily clothed with spoon hairs (see Fig. 26, p. 556). 



Total length, male type, 111.3, female cotype, 106.6; head and body, 73.5, 70, 

 tail, 37.8, 36.6; forearm, 49, 47; third metacarpal, 47.2, 46.5; tibia, 17.5, 16.5; foot 

 10.5, 10.2; ear from crown, 8.5, 9; length from notch at posterior base of antitragus, 

 14.7, 12.5; expanse (tip to tip), 33.8, 32. 



Skull in the old-adult male type with a highly developed sagittal crest, as in 

 Molossus, but differing from the latter in having also the lambdoid crest enormously 

 developed, as in some other species of the Mops group. In the male type the sagittal 

 crest has a height of 1.8 mm. and extends from the interorbital region to the lambdoid; 

 in the female cotype neither the sagittal nor the lambdoid is more developed than in 

 some species of Nyctinomus (e. g., N. ochrace us and N. leonis). Rostral and inter- 

 orbital regions broad (as in other species of the group), the braincase wide and 

 rounded; premaxillae fully ossified; palate deeply concave; basisphenoid pits small 

 and shallow; p 2 vestigial, on the outer edge of the toothrow and difficult to see 

 without the aid of a strong lens. The type has only one upper incisor, the right 

 having been lost in life. (Figs. 12 and 13). 



Measurements of type (male) and cotype (female) skulls: Total length, cf 22.9, 



1 Named in honor of Professor Henry Fairfield Osborn, President of the American Museum o f 

 Natural History, to whose unflagging interest and wise foresight in support of the Lang-Chapin Congo 

 Expedition is largely due its monumental success. 



