18/6.] MR. G. E. DOBSON ON THE MOLOSSI. 715 



the inner margin of the ear-conch reaches to within one tenth of an 

 inch from the extremity of the muzzle ; inner margins of the 

 ears united by their bases on the muzzle at a point nearer to the ex- 

 tremity of the nose than to the anterior commissure of the eyelids ; 

 outer and inner margins of the conch regularly convex ; antitragus 

 separated by a deep and narrow emargination, commencing anteriorly 

 in a plane slightly above the angle of the mouth, tragus small, qua- 

 drate, superior margin straight, outer and inner margins concave, no 

 projecting lobule at the base of the outer margin ; keel of the ear- 

 conch as in M. perotis, terminating posteriorly and inferiorly in a 

 deep, thick, flattened ridge, which is in the same perpendicular line 

 with, and almost touches the antitragus. 



A smaller gular sac in J , rudimentary in 5 , opening directed 

 downwards and slightly forwards. 



Wings from the ankles ; distribution of fur upon the wing-mem- 

 branes as in M. perotis ; above, light brown at the base of the hairs, 

 then chestnut-brown, the extreme tips greyish, so that the upper 

 surface appears altogether grey ; beneath similarly coloured but much 

 paler. 



Upper and lower incisors as in M. perotis ; the first upper pre- 

 molar scarcely elevated above the gum, in the centre of the space be- 

 tween the canine and second premolar. 



Length (of an adult £) : head and body 3" - l ; tail 2"' 15, tail 

 free from membrane 1""0; head I""2; ear 0" - 9, tragus 0"' 12; 

 forearm 2"*35 ; thumb 0"\35 ; second finger — metacarp. 2"*3o, 1st 

 ph. 1"*0, 2nd ph. 1"'2; third finger — metacarp. 2""2o, 1st ph. 

 0"-85, 2nd ph. 0"'3 ; fourth finger— metacarp. l"-2, 1st ph. 0"75, 

 2nd ph. 0"35 ; tibia 0" - 8 ; foot and claws 0"'5. 



Hab. Brazil (Mato Grosso) ; Surinam ; Jamaica ; Cuba. 



9. MOLOSSUS BONARIENSIS. 



Promops bonariensis, Peters, Mon. Akad. Berl. 187-4, p. 232 (cum 

 fig., pi.). 



Ears united by a deeper band than in M. ylaucinus ; ear-conch as 

 broad as high ; antitragus broader than high, convex ; tragus qua- 

 drate, as in the preceding species. Muzzle obliquely truncated, ex- 

 tremity of the nose almost double as broad as the base of the anti- 

 tragus; upper lip with a few shallow vertical wrinkles. 



Wing-membrane from the ankles. 



Fur rather short, somewhat shorter above than beneath. Beneath, 

 the wing-membrane is covered as far as a line drawn from the middle 

 of the humerus to the knee ; a few short hairs extend along the 

 posterior margin of the forearm. Above, the outer half of the ante- 

 branchial membrane is covered with short woolly hairs; and a band 

 of similar hairs passes outwards behind the forearm, becoming gra- 

 dually so broad as to cover almost half the metacarpal bone of the 

 last finger. Above, reddish brown, the base of the hairs whitish ; 

 paler beneath, the extremities of the hairs brownish white. 



The skull agrees in size with that of M. nasutus, Spix ; but the 

 facial portion is much longer, and the brain-case wider than in that 



