I8d8.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 423 



more, the length of the antler in a straight line is greater than that of 

 the antlers of our oldest C. davatus. It is a matter of interest in this 

 connection, that among the antlers in the collection of the National Mu- 

 seum is one from Orizova, which corresponds almost exactly to M. de 

 Saussure's description, and furthermore has upon it the original label 

 of the collector, bearing the words " Venado cuemicabra" This antler 

 certainly does not belong to our C. davatus, but appears to be a dag- 

 antler of the Virginia deer, of which we have many in the collection. 



Our species differ from Cariacus yucatanensis (Hays) (-G. acapulcensis 

 Caton), in the presence of a metatarsal gland, and in the size and form 

 of its antlers. The latter species, according to Mr. Hays, does not 

 change its color, which is not true of C. davatus. There is in the collec- 

 tion of the National Museum a male deer labeled C. gymnotus, which was 

 presented by the Zoological Society of Philadelphia, and was supposed 

 to have been derived from South America. It is not clearly distinguish- 

 able from C. yucatanensis, and also agrees in color with the gray form of 

 our C. davatus. From the latter, however, it is distinguished by the ab- 

 sence of a metatarsal gland and by its forked antlers. It is also much 

 darker on the face and back, while the insides of the legs are wbiter. 

 The hairs surrounding the tarsal gland are white, and the hair posterior 

 to the navel has the points directed backwards, while in C. davatus they 

 are directed forwards. The hoofs are black throughout in this speci- 

 men, but in C. davatus they are yellow horn-color at the extremity. 



It seems to me improbable that Cariacus toltecus (Saussure) is iden- 

 tical with C. yucatanensis, but rather with C. sartor ii Sauss. (= Coassus 

 rufinus B. & P). But of this I desire to treat in a subsequent article. 

 At all events none of these nominal species appear to have any close re- 

 lationship to our C. davatus. 



From the specimens in the National Museum it appears that the range 

 of C. davatus extends at least from the province of Tehuantepec, in Mex- 

 ico, to Costa Bica; but its presence in Yucatan, British Honduras, and 

 Nicaragua has not been ascertained. There are no specimens from the 

 Pacific coast of Central America, and it is improbable that the species 

 occurs there. 



Measurements of two mounted skins of C. davatus, in millimeters. 



