THE QUADRUPEDS OF ARIZONA. 
BY DR. ELLIOTT COUES, U. S. A. 
(Coneluded from p. 400.) 
Fairy Hystricidæ, the Poreupines. The yellow- 
haired Porcupine (Hrethizon epixanthus) is a large and 
handsome species, which replaces the common one in the 
Western regions. Besides being somewhat larger than 
the last, there are differences in the color of the hair 
and quills, and some peculiarities of the cranial bones. I 
believe nothing has been observed regarding its habits 
whereby it differs from the Eastern species (E. dorsa- 
tum). It is particularly abundant along the Colorado 
Chiquito River, and nearly all our alires have obtained 
one or more specimens in that vicinity. 
Family Leporidæ, the Hares. Two species of the fam- 
ily are very abundant, and generally distributed over the 
Territory. These are the Great “Jackass” Hare (Lepus 
callotis), and the Sage Rabbit (L. artemisia). Certain 
other species, as Z. Oalifornicus, in the Colorado Valley, 
or L. campestris, in Northern Arizona, may possibly 
occur; but the two first named are the only common 
and characteristic ones. 
The Jackass Hare includes in its extensive range nearly 
all the great Western prairies extending into Texas and 
New Mixies; and is, in places suited to its wants, a very 
abundant animal. In some desert regions it and the Coyoté 
are almost the only animals of any size to be found, and 
it is difficult to i imagine how they derive nourishment from 
such forbidding Igcalities. It must feed largely upon 
sage-brush, grease-wood, kreosote-plant, young mimosas, 
and the ike. for these constitute the main features of 
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