1876.] MR. G. E. DOBSON ON THE MOLOSST. 729 



on the muzzle by a low band at a distance from the end of the nose 

 equal to the length of the base of the antitragus ; inner and outer 

 margins of the ear-conch evenly convex above ; ear-keel very deep 

 and slender in lower third, where it is partly folded upwards and back- 

 wards, so as to present a flat surface externally ; superior and inner 

 margin of the conch with four minute horny projections ; antitragus 

 rather small, but separated posteriorly by a deep notch, convex, about 

 once and a half as long as high ; tragus quadrate, with a straight 

 superior margin and projecting outer angle, inner margin straight, 

 outer slightly concave. Extremity of the muzzle very obliquely 

 truncate. Upper lip very expansible, with a few deep vertical 

 grooves. No gnlar sac. Thumbs and feet small. Wings from the 

 lower end of the tibiae. 



Fur dark brown above and beneath, with slightly greyish extre- 

 mities ; the base of the hairs whitish. The face is nearly naked ; 

 a few hairs form a fringe along the anterior margin of the upper lip 

 beneath the nostrils. With the exception of a narrow band of very 

 short fine hairs, which extends on the upper surface of the wing- 

 membrane behind the forearm to the carpus, the membranes exter- 

 nal to the humerus appear to be quite naked ; along the sides of the 

 body the fur extends as far outwards, above and beneath, as a line 

 drawn from the middle of the humerus to the knee. 



Upper incisors separated by a space in front ; lower incisors 4, 

 bifid, crowded ; internal basal cusp of canine small ; first upper pre- 

 molar small, conical, acutely pointed, in the centre of the rather 

 wide space between the canine and second premolar ; second upper 

 premolar with an acute internal basal cusp ; first lower premolar not 

 crowded, as broad at the base as the second, which exceeds it (as in 

 all other species of the genus) in vertical extent. 



Length (of an adult tf ) : head and body 3"'0 ; tail 2"' 1, tail free 

 from membrane 1"*1 ; head 1 " • 1 5 ; ear l"-0, tragus 0"'15x0"*l ; 

 forearm 2" - 35 ; thumb ""35 ; second finger — metacarp. 2""25, 1st 

 ph. 0" - 95, 2nd ph. 1"-1 ; third finger — metacarp. 2"'l, 1st ph. 0" - 8, 

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

 ph. 0"-2. 



Hab. Surinam. Type in the collection of the British Museum. 



16. Nyctinomus macrotis. 



Nyctinomus macrotis, Gray, Ann. & Mag. Nat. Hist. 1839, p. 5; 

 Gervais, Exped. Castelnau, Zoologie, p. 62, pi. xii. figs. 1 and 1 a 

 (skull and teeth). 



Dysopes auritus, Natt., Wagner, Wiegm. Archiv, 1843, p. 368 ; 

 Burmeister, Thiere Brasiliens, p. 69 (1854). 



Dysopes laticaudatiis et D. ccecus, llengger, Saug. Paraguay, p. 88. 



1 Dysopes aurispi?iosus, Peale, United-States Explor. Exped. viii. 

 p. 21. 



Ears large, nearly as long as the head, conjoined to a height of 

 0"*2 inch, the inner margins very convex and consequently close 

 together for more than half their length above the band uniting 

 their bases; integument forming the ear-conch verv thin, translu- 



