187C] MR. G. E. DOBSON ON THE MOLOSSI. 733 



inwards and forwards ; a blunt projection from the cingulum of each 

 posteriorly. First upper premolar small, but much larger than in 

 the other species of the genus, filling up the space between the canine 

 and second premolar. Lower incisors six, deeply bifid ; first lower 

 premolar small and acutely pointed, its inner side partly covered by 

 the expanded cingulum of the second premolar, as in M. rufus ; 

 second premolar double the size of the first, its cingulum directed 

 oblicmely forwards and upwards. 



Length (of an adult §): head and body 2"'l ; tail l"*2a, tail 

 free from membrane 0""6 ; headO '8 ; ear 0"'6, tragus 0""15 x 0"'l ; 

 forearm 1"'35 ; thumb ""26 ; second finger — metacarp. 1"*3, 1st 

 ph. 0"*o5, 2nd ph. 0"'7 ; third finger — metacarp. 1"'25, 1st ph. 0"*45, 

 2nd ph. 0"'4 ; fourth finger — metacarp. 0""9, 1st ph. O'^So, 2nd ph. 

 0"\15 ; tibia "'4 ; foot and claws 0"'3. 



Hub. Australia (New South Wales, Queensland) ; Norfolk Island. 



Inc. r; Pm. .-£^. Ears separate, tragus triangular. 

 (Subgen. Mormopterus, Peters.) 



20. Nyctinomus albiventer, n. sp. 



Ears triangular, shorter than the head, inner margins arising from 

 distinct points of origin from the forehead ; inner margin of the ear- 

 conch almost straight, slightly concave in upper third, tip rounded 

 off, outer margin straight ; antitragus scarcely defined, separated 

 posteriorly by a very shallow notch ; tragus nearly as broad opposite 

 the base of its inner margin as high, irregularly triangular, rounded 

 off above, very similar in shape to that of N. norfolcensis, but 

 less triangular and broader above, an obtuse projection about the 

 middle of its outer margin. Extremity of the muzzle projecting very 

 much beyond the mandible, the end of the nose very prominent and 

 distinct from the upper lip, nostrils opening almost laterally. Sides 

 of the upper lip with vertical grooves not well defined. Gular sac 

 small. 



Wings from the lower third of the tibise or from the ankles ; fifth 

 toe somewhat smaller than the first. 



Dentition similar to that of N. acetabulosus (to be described), but 

 the lower incisors are not crowded. 



Fur, above, white at the base, the remaining part dark brown ; 

 beneath, the greater part of the chest and abdomen dirty white, the 

 sides brown. Wing- and interfemoral membrane nearly naked ; a 

 narrow band of fur extends outwards behind the forearm and along 

 the proximal third of the fifth metacarpal bone. 



Length (of an adult 5, the type): head and body 2"'2; tail 1"*25, 

 tail free from membrane 0"*7 ; head0"*85 ; ear "'65, tragus 0" - 15 ; 

 forearm 1"*45 ; thumb 0"'35 ; second finger — metacarp. 1"*4, 1st 

 ph. 0"'55, 2nd ph. 0' '•/; third finger — metacarp. 1"*4, 1st ph. 0"'5, 

 2nd ph. 0'''35; fourth finger — metacarp. 0"'9, 1st ph. 0"-35, 2nd 

 ph. 0' • 15 ; tibia "*4 ; foot and claws 0"*3. 



llab. Madagascar. 



Type in the British Museum. 



