298 PROCEEDINGS OF THE ACADEMY OF [April, 



present distribution of the species shows that the specimen was 

 evidently collected on the west coast of Mexico or Central Amer- 

 ica, at some one of the points visited between San Bias and 

 Panama. 



Distribution. — The only accurate records for the occurrence of 

 this species giv^e us little information as to its exact distril)ution. 

 Aside from Mirador and Cerro de los Pajeros, Vera Cruz, Mexico, 

 the only other accurate captures are from Guatemala' and Cartago, 

 Costa Rica; U. S. Nat. Mus., No. iflH- 



It has been recorded from " les regions chaudes du Mexique " 

 by Saussure, and erroneously from Cuba by Lichteustein and 

 Peters. The whole data shows the species to range from south - 

 central Mexico (Cerro de los Pajeros) to Costa Rica (Cartago), 

 probably within zonal limits, but as to this we know little, for 

 while both of the localities in the State of Vera Cruz are well 

 elevated (above 6,000 feet), Cartago lies in a valley between moder- 

 ately high ranges of mountains, and Saussure' s specimen was stated 

 to have come from the warm section of Mexico. 



General Characters. — Those of the genus and subfamily of 

 which it is the only representative. 



Head. — Short, broad and deep; the upper lip emarginate, the 

 lower jaw extending beyond the upper, both with the margin 

 beaded. Face with a median depression between the eyes, this 

 being flanked by a fold of skin with a sinuate border, superior to 

 this lies a semicircular thickening, above which, between the ears, 

 is a large appressed fan-like structure with a crenulate border; 

 above each eye lies an irregular protuberance, bet\veen the eyes 

 extends a narrow sinus which forms the lower margin of the folds 

 mentioned abov^e; between the nostrils lies a flat oblong plale, the 

 upper bordc of which is rounded in some specimens and produced 

 in others, the nostrils being laterally bordered by raised converg- 

 ing ridges which terminate below in lobes on the upper lip on each 

 side of the central emargination, the latter having a small central 

 lobule. The chin folds in the male are highly developed, num- 

 bering three, the anterior one extending from one corner of the 

 mouth to the other, and the posterior one from antitragus to 

 antitragus, the whole being more or less thickly and heavily haired ; 



'Peters, see Alston, Biol. Cent. Amer., Mamm., p. 53. 



