732 MR. G. E. DOBSON ON THE MOLOSSI. [Nov. /, 



to the end of the nose ; inner margins not united, but arising close 

 together from the muzzle about midway between a line drawn be- 

 tween the eyes and the extremity of the nose; inner and outer. mar- 

 gins of the ear-conch almost regularly convex, continuous ; the inner 

 margin with five or six minute horny projections ; antitragus but 

 slightly developed, separated posteriorly by a shallow and small notch ; 

 tragus quadrate, larger than in N. gracilis. Upper lip with nume- 

 rous vertical wrinkles ; muzzle in front of the origin of the inner 

 margins of the ears flat, terminated by the sharply cut margins of 

 the nostrils. No gular sac. 



Wings from the distal third of the tibiee near the ankles. Fur 

 moderately long and very dense, extending upon the wings above 

 and beneath as far outwards as a line drawn from the middle of 

 the humerus to the knee, the remainder naked. Lower incisors six, 

 crowded ; the outer incisors very slender, overlapping the external 

 margin of the middle incisors, the internal margins of which are also 

 overlapped by the central incisors ; first upper premolar small, with 

 an acute cusp well elevated above the gum in the centre of the small 

 space between the canine and second premolar. 



Length (of an adult $): head and body 2"*25 ; tail 1"*4, tail 

 free from membrane 0"'8 ; head 0"'8 ; ear Q"*7, tragus 0"- 15 X 0"-l 2 ; 

 forearm 1"7 ; thumb 0" "3 ; second finger — metacarp. i"'65, 1st ph. 

 0"*65, 2nd ph. 0"'8 ; third finger— metacarp. 0"*65, 1st ph. 0"-55, 

 2nd ph. 0"*45 ; fourth finger — metacarp. 0"8 ; 1st ph. G"-5, 2nd ph. 

 0"*25 ; tibia 0"'5 ; foot and claws 0' r 33. 



Hab. The warmer regions of North and South America and their 

 islands, extending from California to Chili ; apparently everywhere 

 distributed throughout the tropical and subtropical parts of America, 

 where it is probably the most common species of the genus, as it has. 

 the widest range. 



19. Nyctinomus norfolcensis. 



Molossus norfolcensis, Gray, Ann. Nat. Hist. iv. p. 7 (1839). 



Nyctinomus planiceps, Peters, Monatsb. Akad. Berl. 1866, p. 22. 



Molossus wilcoxii, Krefft, List of Australian Bats (1871). 



Ears triangular, shorter than the head, separate, their inner margins 

 arising from distinct points of origin ; inner margin of the conch 

 almost straight, tip broadly rounded off, outer margin straight ; anti- 

 tragus scarcely distinguishable from the outer margin, a small almost 

 imperceptible shallow notch indicating its commencement ; tragus 

 triangular, rounded off above. Muzzle flat, obtuse ; the upper lip 

 with shallow vertical wrinkles ; nostrils opening sublaterally. Gular 

 sac small, aperture circular, directed downwards ; quite rudimentary 

 in female. Wings from the ankles ; the outer and inner toes equally 

 enlarged. 



Fur reddish brown above, paler beneath ; base of the hairs much 

 lighter. Above, a broad band of very short fur covers the wings 

 behind the proximal four fifths of the forearm, but does not extend 

 to the carpus. 



Upper incisors long, widely separated at their bases, converging 



