ON OUR KNOWLEDGE OF THE CHIBOPXEKA, ETC. 191 



reflected outwards as in N. stramineus, but beneath it, in front, there is, as 

 in the species of ChiJonycferis (PJii/lJostomiJce), but much less developed, a 

 small horizontal cutaneous jjrojectioti, like a second lower lip. 



Wings from the tibias, at junction of middle and lower thirds. Foot 

 extremely small, appearing scarcely half the size of that of JV^. dramineus. 

 Fur, above, pale yellowish brown at the base, the terminal half reddish or 

 chestnut brown ; beneath, pale yellowish brown throughout. This is the 

 appearance of the fur in alcohol. 



Upper incisors like those of N. stramineus, but the outer incisor on each 

 side, instead of exceeding the inner in cross-section, is equal to or even 

 smaller than it ; upper premolars as in that species, but the second pre- 

 molar is still moi'e widely separated from the third. 



Length (of the type, an adult male) : head and body l"-5, tail 1"85, 

 head 0''-65, ear 0"'5, forearm 1"'3, thumb 0"'15, third finger (metacarp. 

 r'-5, 1st ph. 0"-55, 2nd ph. 0"7), fourth finger (metacarp. 1"-1, 1st ph. 

 0"-;35, 2nd ph. 0"-35), fifth finger (metacarp. l"-05, 1st ph. 0"-35, 2nd 

 ph. 0"-35), tibia 0".65, foot 0"-25. 



Hah. Jamaica (environs of Kingston). 



Natahis lepidus, Gerv., is still smaller, has a differently formed tragus, 

 and is also easily distinguished from both this species and N. stramineus 

 by its dentition.' 



The discovery of this additional form requires a change in the synopsis 

 of the species as given by me at page 342 {op. cit.) ; the species may now 

 be arranged as follows : — 



a. Lower premolars equal. 



a'. A horizontal cutaneous expansion beneath the 



lower lip in front ; forearm l"-3 . . . JNI microjnis. 



v. No cutaneous expansion ; forearm 1"'5 . . N. stramineus. 

 h. First lower premolar half the size of the second. 



f'. No cutaneous expansion ; forearm 1 '05 . . N.le^idus. 



Thyroptera tricolw, Spix. 



To localities of this species add Sarayacu, Ecuador (Buckley and 

 0. Thomas). 



Myxopoda aurita. 



Myxojjoda aurita, A. Milne-Edwards, ' Bull. Soc. Philom. de Paris,' June, 1878 ; 

 Dobson, <P.Z.S.' 1878, p. 871. 



Crown of the head but slightly raised above the face-line ; muzzle 

 obliquely truncated, in general form closely resembling that of the species 

 of the genus Chilonycteris {Phyllostomidm), for the nostrils open widely 

 apart by similar circular sharply defined margins, and the lower lip is also 

 papillated and reflected outwards, though not so broadly, and it has not a 

 thin free margin ; the obtuse extremity of the rather long muzzle projects 

 in front considerably beyond the lower lip. Ears very large, much longer 

 than the head, in general outline like those of Vespertilio murinus, but the 

 inner margin of the conch commences in a small lobe projecting down- 

 wards ; in the usual position of the tragus or slightly in front of it there 

 is an irregularly square lobe continuous above with the keel of the ear- 

 conch ; opposite this, on the outer side, is a mushroom-shaped process 

 consisting of a short stalk supporting a bi'oad flat reniform expansion ; the 

 outer margin of the conch terminates near the angle of the mouth. 



' See Catal. CMroj)t. Brit. Mm. 1878, p. 344. 



