2i6 The Mammals of Colorado 
Spilogale arizonae. Arizona Spotted Skunk 
Spilogale phenax arizonce Mearns, Bull. Amer. Miis. Nat. Hist., 
iii., p. 256 (1891). 
Type locality. — Fort Verde, Arizona. 
Measurements. — Total length, 16.5; tail vert., 5.1; hind foot, 1.7. 
Description. — Color and markings much as in other species; tail 
with terminal fourth above, and terminal third below, white. 
The skull is rather large ; the zygomata are widely and abruptly 
expanded, arched upward at the highest point, higher in this 
particular than in any other of our species of the genus; this is 
especially noticeable when the skull is viewed from behind; rostrum 
and intertemporal region narrow; the bullae and mastoid capsules 
are noticeably much inflated ; upper molar relatively small. 
The highly arched zygomata and greatly inflated bullae and 
capsules are the principal points by which arizonce may be dis- 
tinguished from the other Colorado species of Spilogale. 
Distribution. — The Arizona Spotted Skunk is found in central and 
southern Arizona, western New Mexico, and adjacent parts of 
Mexico, and has been taken at two Colorado localities, Salida and 
Coventry, but has not heretofore been recorded, this being the 
first publication of these records. At Coventry 5. g. saxatilis has 
also been taken, and seems to be the more common. 
Spilogale tenuis (Lat. thin, fine, delicate). Rocky 
Mountain Spotted Skunk. 
Spilogale tenuis Howell, Proc. Biol. Soc. Wash., xv., p. 21 (1902). 
Type locality. — Arkins, Larimer County, Colorado. 
Measurements. — (Of type, from Howell) : Total length, 17.7 ; tail 
vert., 6.5; hind foot, 2.0. 
Description. — Markings as described for genus, terminal third of 
tail white. Brain-case broad and very flat; fronto-parietal region 
not elevated above plane of skull; rostrum and postorbital region 
narrow, but without pronounced constriction, the narrowness also 
including the anterior portion of brain-case ; auditory bullae and 
mastoid capsules more inflated than in case of either the other 
Colorado species except arizonce, especially noticeable from above. 
The posterior end of the skull is higher than in saxatilis or interrupta, 
hiding, when skull is viewed from behind, the greater part of the 
brain-case. Teeth rather small. 
Distribution. — Howell gives the distribution of this species as: 
"Eastern slopes of the Rocky Mountains in Colorado and New 
Mexico; limits of range unknown." In Colorado it has been taken 
at Arkins, Larimer County; at Estes Parkfat Boulder; and possibly 
