74 ZOOLOGY. 



the dorsal area becoming insensibly darkened in tone by an intimate admix- 

 ture of mouse -gray. On this darkened area, the color is a blended grizzle 

 of the mouse-gray with pale fawn or nearly colorless ends of the hairs. 

 The tail is rich reddish brown on the central field above, fringed and tipped 

 with white, and pure white below. Some of the terminal reddish hairs have 

 a slight blackish tipping, but the sum of this scarcely produces a noticeable 

 effect. The fore limb inside is white throughout, and whitish all around the 

 digits ; the hind limb is perfectly white inside only above the heel, and 

 whitish all around the digits ; both sides of the metatarsus being colored. 

 The ears are dark mouse-gray outside, bleaching at the edges; the hairs 

 inside are pure white. The forehead is extensively dusky ; the naked 

 muffle and the abundant eye-lashes are jet black. 



No. 656, $ , collected in the same place, at the same time, shows no 

 tangible differences in color. It is, of course, considerably smaller than the 

 buck. 



A doe, killed in May, 1855, by Dr. C. B. R. Kennerly, at San Luis 

 Springs, which furnished Professor Baird's account of C. " mcxicanus", is 

 thus described as to color: " The prevailing color of this animal is an ashy 

 brown, pointed with light gray or dull whitish. The hairs themselves are 

 generally light gray at the base ; the terminal portion becoming of a pure 

 brown, (without any shade of red or yellow,) darkest near the tip, where 

 it is rather broadly annulated with light gray, clearer than at the base, and 

 with perhaps a faint tinge of yellowish. The under surfaces are lighter ; 

 the only pure white appears to have been in the inguinal region. The tail 

 is entirely Avhite beneath and all round. At the base above it is gray like 

 the back; the sub-terminal portion is whitish, with a pale rufous tinge. The 

 bases of the hairs above, however, except perhaps at the extreme end of the 

 tail, are dark brown, darkest toward the tip. The head, including the con- 

 vexity of the ears, presents the same grayish or pepper-and-salt color of the 

 rest of the body. The end of the muzzle is encircled by a dusky ring, 

 I Kissing just, behind the naked muffle; this ring is quite distinct on the side 

 of the lower jaw, but for the rest is rather obsolete, being replaced by ;i 

 grayish sha.de. 'The side of the muffle on either side of the nostrils and 

 the tip of the chin are white. There is an increased :mioinit of li^ht in the 



