26 Mearns — A Neiv Deer from Texas and Northern Mexico. 



relatively longer limbs, larger horns, smaller teeth, and more elongate 

 rostrum. 



Dorcelaphus macrourus (Rafinesque) is a large pallid form of the northern 

 plains region, characterized by restriction of the dark, and corresponding 

 ex | nmsion of the light areas. It has widely branching, often scraggy 

 horns, very different from those of D. texanus. 



The only remaining deer of the United States requiring comparison 

 with the small Texan species is the Sonoran deer, Dorcelaphus couesi 

 (Coues and Yarrow), a still smaller and more pallid animal, having much 

 larger ears, on which the black edging and tips were wanting. The den- 

 tition of D. texanus is much heavier, and the tail considerably shorter, 

 than in D. couesi. 



The only Mexican deer with which the present form requires compari- 

 son is the animal that has been known by the specific name mexicanus. 

 This name was first applied by Gmelin.* According to Dr J. A. Allen, t 

 " the Cervus mexicanus of Gmelin, however, is a vague composite species, 

 only in part referable to Deer from Mexico, and in all probability has 

 no relation to the little Sonoran Deer described by Baird."} The name 

 mexicanus may, however, be regarded as fixed to a deer of southern Mex- 

 ico, very different from the Texan deer, by Lichtenstein, who descrihed 

 and figured the species $ from specimens sent alive to Berlin, in 1S25, by 

 Herr Graf, from ' Mexico,' without indication of the exact locality at which 

 they were taken. 



*Syst. Nat., I, 1788, p. 179. 



t Bull. Am. Mus. Nat. Hist., VII, June 29, 1895, p. 200. 

 X Kept. Pacific R. R. Expl. and Surveys, VIII, Mammals, 1857, pp. 

 653-655, pi. XXIV, fig. 2. 

 I Darstellung, 1827-'34, pi. XVIII. 



