172 



r.ULLETTN no, TTNTTED STATES NATIONAL MUSEUM. 



r ij pclocdl'itij. — Fort C'liii'k, Kinney County, Texas. (TyiH', skull 

 and skin, No. 84704, U.S.N.M.) 



Geographical ranf/e. — Inhabits the Rio Grande region of Texas, 

 extending- south through Mexico as far as San Lnis Potosi. 



General c/iaracters.— Size small; ears relatively small, with black 

 on edges and tip; horns small and strongly incurved; limbs rela- 

 tively short; molar and premolar teeth very large; general color 

 pale; coat fine and long. 



Color. — In the type, which is in complete winter coat, the upptir 

 s^urface is sui)erficially a jjepper-and-salt mixture of black, yellowisli 

 white, and gray. A distinctly blackish area begins anteriorly on the 

 crown, between the horns and ears, and extends posteriorly almost to 

 the root of the tail. The color gradually pales to light yellowish 

 ash on the sides. All of the hairs of the upper surface are white at 

 extreme base, plumbeous ash in the middle, black apically, and sub- 

 terminally ringed with yellowish white, these whitish annuli increas- 

 in"' in width from the \'ertebral area downward. Under surface 



Fig. 9. — oikxoii.kis a.mkhicams. (Cat. No. 912, ['.S.N.M., Viiicima.) a, Skiij.; /<, ArnrTAi. uegiox 



pure white on the axilhv, inner surface of thighs, and alxlomen : 

 fuliginous on the chest. Tail white below, bhu-k above, the blade of 

 the upper surface mucli obscured by broad yellowish brown subter- 

 minal ainiuli to the hairs. Head, with naked nose-pad, and front of 

 under lip, plumbeous l)hic]v. Iris yellowish hazel. Upper jaw white 

 anteriorly, next to the naked muffle, becoming light ash farther back, 

 with an intervening area of black, which latter forms a triangular 

 area, with its base applied to the i)osterior margin of the nostril and 

 its apex crossing the middle of the U})per lip and extending over the 

 under jaw to form a small black spot behind the pure white chin. 

 Throat white, mixed with ash where the basal coloring of the hair is 

 exposed, between the Avhite tips. Upper side of head l)lack. nnich 

 obscured on the forehead by dirty white and reddish subterminal 

 annuli. ()rl)its and base of ear externally whitish. Concavity of 

 ear densely clothed with long white hair; convexity tipped and 

 bordered by black, except at base anteriorly, the black inclosing an 

 area of ])e]5per-and-salt gray; base of ear i)osteriorly clear ash gray. 



