i6 
The Mammals of Colorado 
Seton figures that if there is no error in the figures it meant at 
least two miUion Antelope. Dr. Coues, in his list of the 
Maxwell collection, says: "I have nowhere else found Ante- 
lope so abundant as they were in the North Park in the 
summer of 1876. They were almost continually in view, 
and thousands must breed in that locality." 
The curious white area on the buttocks is covered with long 
hairs which can be raised at the will of the animal and spread 
rapidly; when this is done in bright sunlight the buttocks 
shine almost like tin pans and can be seen at a great distance; 
the apparatus probably serves both as a recognition mark 
and as a danger signal. 
The speed of the animal is very great, probably exceeding 
that of any other North American game animal; Seton 
estimates its best speed at 32 miles an hour, but such a rate 
cannot be kept up for any distance, and then the animal's 
curiosity is also apt to get the better of its judgment, and it 
stops to look around and see what alarmied it. This curiosity 
used to be taken advantage of by hunters, who enticed the 
animals within range by waving a handkerchief or making 
some actions to attract their attention and get them to 
approach closer. 
The local range of individuals and bands is usually not 
very great, and they keep closely in one neighborhood, 
excepting when they perform the migrations above described. 
The shedding of the horns is rather a curious process, 
probably unlike that of any other mammal. Lyon describes 
the process as follows: ''The kids are born during the spring 
and are of course at that time hornless. By the middle of 
summer the first horns begin to appear, being small and 
conical and concealed in the hair of the forehead. They 
reach a length of nearly an inch by autumn. Early in the 
winter they drop off, leaving small knobs projecting from the 
frontal region about half an inch long and covered with hairs. 
