THE QUADRUPEDS OF ARIZONA. 357 
It is just possible that a western Fox Squirrel (8. Lu- 
dovicianus Custis, or 8. limitis Baird) should extend into 
eastern Arizona; or that S. fossor Peale, of California, 
should reach the Colorado River. These, however, are 
rather speculative than demonstrated assertions, and 
await proof. 
In addition to the preceding, a true Gray Squirrel in- 
habits Arizona, which I am inclined to think is a species 
new to science. It must be quite rare, as I never saw 
or obtained but a single one,—a female, shot December 
20, 1865, at Fort Whipple. In general appearance it is 
similar to the common Eastern species, with which it 
agrees closely in the colors of the body;, but it is 
smaller, and at the same time the tail is both relatively 
and absolutely longer, as well as much broader. It is 
possible that this may be the species alluded to by Pro- 
fessor Baird, page 263 of his “Mammals of North Amer- 
ica,” as “Sciurus Carolinensis??”, from Santa Catarina, 
N. M. But his description applies only approximately 
to my specimen, which I shall describe as new.* 
SCIURUS ARIZONENSIS Coues, sp. nov.— S. forma et coloribus co: ro 
Sciuro Carolinensi similis; sed we Bel cauda Fete Sis latiore, subtus distinc 
E Detoription.— — Rather smaller than the Eastern Gra Squirrel; of the same 
form and body-colors; the tail lo ang — and m cig, Mia, oo Ears moderate, 
untufted, both sides en Palms rculated, pran n naked, but a little hairy 
on the concavities of the fingers; ith ge lon st, 3d nearly equal, 2d equal to 
Sth. Soles 6 tubercal ulated, naked to the heel, but furred E gay tap then 
sides; est, 2d and ad pearl equal "saa but Jitte shorter. Tail to 
of vertebræ équallin g length body from nose to root of tail, the hairs — 
. ing 31-2 inches beyo bona vertebra. Above, from nose to root of tau, 
efined 
e 
the upper parts and sides. Both eyelid s and a about me EPS i 
woolly space at base of ears ochraceous te. e tail fro ena = 
Same color as outside of thighs, the tawny of the back Stopping at orap 
for ~ the rest of its extent it is black; p iak portion Viewed froin ng the 
air 
tallies oe 3 Raaya prance y orehia r kens in p with black, which is in turn fringed 
with white 
j ieee r canthus of eye, 1.1 (inches and tenths); to roo 
of tail 9.5, tail Py pop piper eds 9.5; to end of hairs 13.0; its width at broa aout 
tof ear .8. Longest whisker 3.3. Palm to end og apima 
with claw 162 = ————" tto 3.6. rE corer tage oe on 
3 Sreatest width of so! 
