9. TRACHYore. 481 



9. TRACHYOPS. 



Trachops, Ch-ay, P. Z. S. 1847, p. 14 : Ann. & Mag. Nat. Hist. xix. 



p. 406 (1847J. 

 Trachyops, Bsters, MB. Akad. Berl. 1866, p. 512. 



Muzzle shorter than in Vampyrus ; horizontal portion of the nose- 

 leaf narrow in front of the nostrils, the erect leaf well developed ; 

 lower lip and chin with a longitudinal groove in front, margined by 

 a double row of warts ; muzzle with numerotis conical warts ; ears 

 large, separate ; the first phalanx of the middle finger shorter than 

 half the metacarpal bone ; interfemoral membrane well developed, 

 extending far beyond the tail, which appears upon its upper 

 surface. 



Dentition. Inc. \, c. j^, pm. ^~, m. |^. 



The second lower premolar smaU, internal. 



This genus is, as yet, represented by a single species only, of wide 

 distribution. It approaches Phyllostoina closely in dentition, but 

 the form of the skull is different, more produced in front, narrower 

 between the postorbital fossae, and the brain-case more vaulted ; 

 the first phalanx of the third finger is much longer in comparison 

 with the metacarpal bone than in Phyllostoina, and the metacarpal 

 bone of the fifth finger is more conspicuously longer than that of 

 the third than in any other genus of this group. 



1. Trachyops cirrhosus. 



Vampyrus cirrhosus, Spix, Simiar. et VespertU. Brasil. p. 64, pi. xxxvi. 



fig. lii. 

 Trachops f uHginosus, Oray, P. Z. S. 1847, p. 14 ; Ann. 4- Mag. Nat. 



Hist. xix. p. 406 (1847). 

 Tylostoma mexicana, Saitsmre, Rev. et Mag. Zool. xii. p. 484 (1860). 

 Trachyops cLrrhosus, Peters, MB. Akad. Berl. 1865, p. 512. 



Crown of the head distinctly elevated above the face-line, muzzle 

 cylindrical ; the distance between the eyes is equal to the distance 

 of the eye from the end of the muzzle ; ears large, oval, broadly 

 rounded off above, longer than the head ; outer and inner margins 

 of the ear-conch convex, the inner margin strongly convex in the 

 lower third, the outer margin slightly concave opposite the tragus ; 

 lower half of the outer margin of the tragus unevenly lobed and 

 toothed, the upper third abruptly narrowed and acutely pointed; 

 nose-leaf in general outline similar to that of Phyllostoma hastatum, 

 but much less developed in front ; the erect ovate-lanceolate leaf 

 acutely pointed, finely toothed on the edges ; horizontal leaf narrow 

 in front of the nostrils, bound down to the muzzle, margined by 

 numerous wart-like projections ; front and sides of the lips studded 

 with small warts, which lessen in number and become smaller 

 towards the angle of the mouth ; lower lip and chin with a central 

 longitudinal groove margined laterally and beneath by a great 

 number of smaU prominent warts (Plate XXV. fig. 2). 



2 I 



