15. THTR0PTJ3RA. 345 



projecting cingulum of the latter tooth ; first lower premolar about 

 half the size of the second, which equals the third in vortical 

 extent. 



Length, forearm l"-05, thumb 0"-12, third finger 2", fifth finger 

 1' -25, tibia 0"-4. 6 > _ 5 



Hah. Cuba. 



15. THYROPTEEA. 



Thyroptera, Spix, Simim-. et Vespei-t. Bresil. p. 61 (1823). 

 Hyonycteris, Lichtenstein et Peters, MB. Akad. Berl. 1854, p. 335 ; 

 Tomes, P. Z. S. 1856, p. 178. ' F , 



Muzzle elongated, slender ; crown of the head considerably ele- 

 vated above the concave forehead ; nasal apertures circular, rather 

 Wide apart ; ears funnel-shaped, the outer margin terminating be- 

 tween the base of the tragus and the angle of the mouth ; base of the 

 thumbs and soles of the feet (in the single species) with hollow siwtorial 

 dislcs ; second finger rudimentary; middle finger with tJiree phalanges ; 

 wings from the base of the daivs ; toes equal, of two phalanges each ; 

 tail produced to the hinder margin of the interfemoral membrane 

 and beyond it. 



Dentition. Inc. -7', c. ^, pm. g, m. t|. 



Upper incisors in pairs, as in Vesperugo^ but separated from the 

 canines as well as in front ; premolars well developed in both jaws, 

 as in Natalus. 



Range. The Neotropical Region (Brazilian Subregion). 



1. Thyroptera tricolor. 



Thyi-optera tiicolor, Spix, Simiar. et Vespe?-t. Bresil. p. 61, pi. xxxvi. 



fig. IX. (1823) ; Dobson, P. Z. S. 1876, pp. 531-4, pi. Iv. figs. 4-6 



(thumb, foot, and calcaneum). 

 Thyroptera bicolor, Cantraine, Bull, de VAcad. Bruxell. xii. p. 489 



(1845). 

 Hyonycteris discifera, Lichtenstein et Peters, MB. AJcad. Berl. 1854 



p. 335. 

 Hyonycteris discifera et albiventer, Tomes, P. Z. S. 1856, p. 179. 



Ears shorter than the head, funnel-shaped, with short subacute 

 tips ; inner margin of the ear-conch convex, much less so than the 

 outer, which in its lower two thirds is strongly convex, ending 

 abruptly about midway between the base of the tragus and the 

 angle of the mouth, but on a lower level, its upper third deeply 

 concave : tragus short, with a prominent lobule opposite the base of 

 its inner margin directed forwards, abruptly narrowed in upper 

 third, very acutely pointed and curved inwards. The extremity of 

 the muzzle projects, and the space between the nasal orifices is 

 occupied by a deep pit, bounded by a rounded fleshy process above 

 and beneath ; lower Up with a central triangular naked cushion cut 

 off by a groove on either side. 



