MEGADERMA. 85 



and feet small. Wing-membrane extending to the tarsus. Inter- 

 femoral membrane of moderate size, triangular. Extreme tip of 

 tail free. Fur reddish-brown, darkest above. 



Dimensions. Head and body about two inches ; tail about 

 one inch ; forearm about one and three-fourths inch. 



Habitat. York Peninsula ; Aru Islands ; Waigiou ; New 

 Guinea ; Duke of York Islands. 



References. Dobson, B.M. Catal. Chiropt. p. 142, pi. ix. fig. 7 

 (front view oj head); G-ould, Marnrn. Austr. iii. pi. xxxiv. 



2. HIPPOSIDEBUS BICOLOK, Temminck, sjj. (1835 1841). 



var. a. H. aruensis, Gray (1858). 



Brown Horseshoe Bat. 



Ears moderate, about equal in length to the head, oval ; the 

 upper third of the outer margin straight. Horseshoe small and 

 square, scarcely as wide as the transverse terminal leaf, the concave 

 front surface of which is divided into four cells by three distinct 

 vertical ridges ; no secondary leaflets ; frontal glandular sac well 

 developed in males, rudimentary in. females. Wing-membrane 

 extending to the ankle or tarsus. Interfemoral membrane slightly 

 angular behind. Extreme tip of tail free. Fur above very dark 

 brown, almost black ; below grayish-brown. 



Dimensions. Head and body about one and three fourths inch; 

 ^ail rather less than an inch; forearm about one and a half inch. 



Habitat. Albany Island, Cape York ; Aru Islands. 

 Reference. Dobson, B.M. Catal. Chiropt. p. 150. 



Family III. NYCTEKID^. 



Nasal apertures situated upon the upper surface of the muzzle, 

 and margined by distinct cutaneous appendages. Ears large, 

 united, with well developed tragi. Index finger with or without 

 a short phalanx. Premaxillary bones cartilaginous or small. 

 Upper incisors absent or very small ; when present close together. 



Subfamily I. MEG ADEEMING. 



Nostrils at the bottom of a concavity near the extremity of the 

 muzzle, concealed by the base of a large cutaneous process ; tail 

 very short, in the base of the large interfemoral membrane ; pre- 

 maxillaries cartilaginous. 



Genus I. MEGADERMA, Geoffrey (1810). 



Muzzle cylindrical, elongated. Nostrils in a slight depression 

 near the extremity of the muzzle, surrounded by a naked cutane- 



