1917.] 



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



453 



MOLOSSID.E. 



50. Myopterus 1 albatus Thomas. 



Plate LIII, Fig. 2. 



Myopterus albatus Thomas, Ann. and Mag. Nat. Hist. (8), XVI, p. 469. River 

 Welle, Belgian Congo. 



Seven specimens (6 skins with skulls, 1 alcoholic), Niangara, December 

 26, 1910. Six are adult females, the other an immature male. 



Collectors' measurements of 5 adult females: Total length, 126 (123- 

 132); head and body, 85 (80-90); tail, 41 (40-42); foot, 13.8 (13-14); 

 ear, 23 (22-24). 



Forearm (in dry skins), same specimens, 53.7 (51.5-56). Ear (from 

 crown on midline), 14 (13.5-14.5). 



Skull (same specimens), total length, 25.2 (24.2-25.7); zygomatic 

 breadth, 14.5 (14.1-14.7). 



Myopterus albatus was described from a skin, without skull, collected 

 by M. Hutereau, on the Uele River, Belgian Congo (type in the Congo 

 Museum, Tervueren, Belgium). The present specimens, from near the 

 type locality, are confidently referred to this species. The light bands on 

 the sides of the back are more yellowish (less whitish) than is indicated in 

 the original description, as are also the entire underparts, and the wing 

 membranes are pale yellow instead of "white," as described. 



51. Nyctinomus ansorgei Thomas. 



' Nyctinomus ansorgei Thomas, Ann. and Mag. Nat. Hist. (8), XI, p. 318, March, 

 1913. Malange, North Angola. Alt. 1150 m. 



Twenty-six specimens (9 skins and skulls and 17 in alcohol) all taken at 

 Faradje, February 20, 1912. 



Collectors' measurements of 9 adults: Total length, 110.5 (105-115); 

 head and body, 75 (72-79); tail, 35 (31-37); foot, 11.6 (11-12); ear, 

 20.9 (20-21). 



Forearm, from the same 9 skins, 46 (45-47); forearm from 16 alcoholic 

 specimens (4 males, 12 females), cf 46.7 (45.4-48.4), 9 46.4 (45.5-48). 



1 On the use of Myopterus Geoffroy in place of Eomops Thomas, see Miller, Families and Genera 

 of Bats, 1907, p. 245, and Thomas, Ann. and Mag. Nat. Hist. (8), XVI, p. 468, 1915. 



