RUMINANTIA—CERVINAE—CERVUS MACROTIS. 657 
elsewhere. The under parts generally appear to be ashy brown, like the back, but without 
annulation of the hairs. The only whitish portion of the inferior surface is seen beneath the 
head, around the axillae, and in the groin. On each side of the tail, on the end of the rump, 
is a dull white patch, crossing above the tail and involving its entire basal half or two-thirds. 
The tail itself is quite slender and cylindrical on the basal two-thirds; the hair there being 
compact and close and then expanding into a dense tuft, which is entirely black. A narrow 
line along the under surface of the tail, which in summer is quite naked, in winter is thinly 
coated with hair. The legs are of a yellowish rusty. The ears are of a sooty tinge along the 
edges of both margins, the centre and basal portion of the concavity being white, that of the 
convexity like the back; there is a whitish patch in the basal portion of the outer edge behind. 
The muzzle presents a hoary appearance ; on each side of the naked mufile is a black spot, 
seen also on the side of the lower jaw, anterior to these the muzzle is white. 
The horns of a mule deer, from Fort Union, at the mouth of the Yellowstone, are, in shape, 
almost precisely like those of one specimen of C’. columbianus, from San Francisco. They are doubly 
and nearly equally dichotomized. The first fork falls a little short of the middle of the antler, 
the second fork of each branch falls a little beyond the first third of the remaining distance. 
The posterior fork is rather the larger of the two. There is a small point on the upper edge of 
the antler, midway between the base and the first fork. 
Fig. 19. Cervus macrotis, No. 831. Big Sioux, Neb. Right horn from inside. Size, 8.23 inches 
to the inch. 
Fig. 20. Same species, (2918.) Yellowstone. Right horn from inside, Size, 5 inches to the 
inch, 
83 L 
