96 
JOUKNAL OF MAMMALOGY 
flight. They can make astonishing horizontal leaps, but are not 
high jumpers ordinarily. 
Cutaneous glands and hair tufts are absent from the limbs, but 
occur at the base of each ear, behind the hocks, one on the lower back, 
one on each buttock, and one interdigital gland on each foot — eleven in 
all. But the lachrymal glands and sinus are absent, although often 
found in the Bovidse. The buttock glands and the dorsal gland are not 
found on any of the Bovidse that I know of. When the rump hair is 
raised or lowered a strong, musky odor is given out, and it is suggested 
by Dr. R. W. Shufeldt that the office of these many glands is to furnish 
an odor to protect the animals from the swarms of insects such as 
gnats, mosquitoes, and flies. 
Prong-horns do not seek to elude observation, all they care about is 
to be able to see for themselves. Their habit of lying on a commanding 
knoll to give full scope to keen eyesight has already been spoken of ; but 
they often take the opposite course and lie in a hollow to get out of a 
breeze, which they do not seem to like. They also are apt to face 
towards the wind to give their ears and noses the very best opportunity 
to detect the approach of an enemy. While ordinarily the color is a 
conspicuous one, still it has some protective value. I remember once 
seeing a stone the same color as an antelope, but when I got opposite to 
it, to my great surprise a big buck antelope jumped up. And I often 
have the opposite experience and have a prong-horn turn out to be a 
stone on closer examination! 
These animals can swim when necessary, often fording swift and 
deep streams (on one occasion I saw a spring flood dashing high over a 
swimming prong-horn, which, although swept downstream at con- 
siderable speed, kept bravely on and finally got across), but I do not 
see them standing in water as deer and elk do, nor do I often see them 
bathing. In fording a stream, they do not stop to drink as elk usually 
do; and I notice that in every case antelopes have left the water on the 
run and have gone quite a distance before even stopping to shake them- 
selves. Perhaps they do not like to risk being between the high banks 
that most of our streams have. 
In their eating, prong-horns confine themselves largely to various 
grasses, preferably those like the gramma, buffalo, and bunch grasses 
that cure well on the stalk. They are also fond of alfalfa and will 
strip the heads from any vagrant oat stalks they find; but they cannot 
live on the rich, green grasses of the East. I have never seen any 
evidence of browsing on bushes and trees, except that they eat leaves 
