THE QUADRUPEDS OF ARIZONA. 353 
animals, both in form and colors. The latter are always 
pure black and white, at least so far as North American 
species are concerned; and there is a great similarity 
between them all in this respect. Dr. C. B. R. Kennerly 
obtained a Skunk at Pueblo Creek, which he says was 
intermediate in size between Mephitis mephitica, and M. 
bicolor. It probably belonged to the former species. 
Others, well known to occur in Texas, New Mexico, etc., 
and therefore likely to occur in Arizona, are M. bicolor, 
the little Striped Skunk; M. varians, the Texas Skunk ; 
and M. mesoleuca, the White-backed Skunk. The first 
named of these extends across the Territory into Califor- 
nia, and quite to the Pacific coast, where I have myself 
known of its occurrence. It is the smallest of all our 
species, and the only one which is spotted or streaked. 
The last is a most beautiful species, well figured by Au- 
dubon and Bachman, though under the erroneous name 
of M. macroura.. It belongs to a different sub-genus ~ 
(Thiosmus) from the rest, being distinguished by hav- 
ing one less upper molar, and a peculiarity in the position 
of the nostrils. 
Concerning the occurrence of the third sub-family, 
trine, I am unable to speak positively. It is most 
probable, however, that Otters do exist in the Territory, 
and they may be referable to that species described by 
Dr. Gray as Lutra Californica, which Professor Baird 
has considered to differ in some appreciable points from 
the common L. Canadensis of the Eastern States. 
Family Urside, the Bears. The two North American 
genera of plantigrade carnivora are represented by the 
ms and the Bears. The former, Procyon, dif- 
fers from Ursus, which comprehends the true Bears in 
dentition, and in many external characters, among which 
NAT., VOL. I. 45 
