.MAMMALS OF THE MEXICAN BOUNDARY. 223 



Mountains, central Arizona, April 3, L886, and still in winter pelage, 

 has the lower jaw and space between rami of mandible all white. 

 A hand of white 25 mm. in width borders the upper Lips, extending 

 to the naked muffle (which divides the lips by a narrow septum), 

 except a dusky spot posteriorly. Another dusky spot -yellowish 

 brown mixture with plumbeous occupies an area at the angle of 

 the mouth, extending backward about '_'"> mm. The white of the 

 upper lips and lower jaw is confluent behind this angular spot. 

 and extends backward upon the check-, decreasing to a terminal 

 point below the middle of the eye. The inner surface of the ears — 

 which are coated with long hairs — and base of ears anteriorly and 

 externally are also white. There are two crescentic white patches 

 upon the sides of the neck behind and below the ears, separated 

 by a narrow mesial stripe. Behind them is another semilunar 

 area of white which extends across the underside. The upper sur- 

 face of the head, backward to between the horns, is dark brown, 

 almost blackish anteriorly, grizzled posteriorly, and mixed with pale 

 yellowish. There is also a blackish brown area at the anterior base 

 of the horn, extending to the eye. and another below the ear. which 

 latter is edged with the same except below. The rest of the head and 

 neck is yellowish, or reddish brown of different shades, varying from 

 buckskin, on the convexity of the ears, to chestnut rufous upon the 

 mane, which begins upon the occiput and has a considerable admix- 

 ture of dusky tips to the hairs. 



Adult female (No. 381, Mearns's collection), from same locality as 

 above, killed April 1, 1886, has the coloration of the underside of the 

 head and neck the same as. in the male above described, except that 

 the white crescents upon the upper part of the neck are entirely 

 united, forming a large white crescent or shield shaped mark. The 

 coloring above is paler. The blackish brown color of the faceextends 

 backward little if any beyond the tips of the nasal bones; color 

 thence to the line of the eyes yellowish. There is some admixture of 

 black tips to the hairs between the orbits. There is no distinct black 

 spot at the anterior base of the horn, but the lashes and a small spot 

 above the front of the eye are black. The long hairs at the base of 

 the horns are blackish, instead of being nearly white as in the male. 

 Spots on upper lip and angle of mouth obsolete. 



A yearling (?) female (No. 380, Mearns's collection), from the 

 same locality as above, April 3, L886, has the coloration >till paler 

 than that of the adult female. The dark areas are still more 

 restricted, there being no trace of dark spots on upper lip and at 

 angle of mouth. The pure white areas are more extended. The 

 horn- are nearly concealed by the hair, which forms a black spot 

 around them. 



