314 
U. S. P. R. R. EXP. AND SURVEYS-ZOOLOGY—GENERAL REPORT. 
fifth, which extend to the base of those adjacent to them. The soles are densely furred to the 
hase of the toes. The tail vertebrae are rather more than half the length of the body, the hairs 
flattened out, so that the outlines are nearly parallel. 
The upper parts generally are of a finely grizzled yellowish gray, brown and black, the color 
purer on the anterior portion of the hack ; under parts, including the tail, sides of the head, 
ring around the eye, and a distinct stripe on each side from the shoulders to the hips very pale 
brownish white ; near the outside of the shoulder, arms, and legs of a pale chestnut, this color 
tinging the grizzled sides below the light stripe ; the hairs on the thighs with paler tips and 
and some long black hairs interspersed. The tail is very pale brownish white externally, then 
black, then white as before, and finally black on the central line; each lateral hair, therefore, 
having the hase and sub-terminal bar black, the margin and suh-hasal bar white. All the 
lateral hairs have a very narrow tip of black, scarcely appreciable. The whole under surface 
shows a uniform whitish, the concealed bases only being dusky, the basal third above is like 
the hack. The hairs on the upper part of the body are dark plumbeous at the extreme base, 
then silky white for the greater part of their length, then brown passing into black, and finally 
tipped with the whitish as described ; interspersed are many hairs entirely black. Under the 
light lateral stripes, the hairs are without the dusky at the terminal portion, or only lead color 
and whitish. The hairs on the under parts are all plumbeous at hase. 
A second specimen, in alcohol, of this rare spermophile was received from J. G. Bell, Esq., 
who was unable to give its locality with precision, hut supposed it to he from Wisconsin, as it 
came in company with a skin of S. franhlini ,, labelled as from that State. 
This species is readily distinguishable from Spermopliilus lateralis by the much smaller and 
lower ears, smaller size, entire absence of a dusky margin to the light lateral stripe, &c. 
Harris’ spermophile was first described by Audubon and Bachman from a specimen presented 
to them by J. R. Townsend, without any indication of locality. This was first accurately 
ascertained by Dr. Heermann. 
List of specimens. 
| Catalogue number. 1 
Corresponding No. 
of skull. 
Locality. ' 
When 
collected. 
Whence obtained. 
Original number. 1 
Nature of 
specimen. 
Measurements. 
Collected by— 
Nose to occip.l 
Nose to tail. 1 
Tail to end of 1 
verteb. 
Tail to end of 1 
hairs. 
Length, fore 
5.0 
J 
Ears, above 1 
notch. 
Ears, above 1 
skull. 
Tail, breadth 
of. | 
471 
2489 
1600 
Mohave desert. 
Western America, 
(labelled Wis.!!) 
1853 
Lt. R. S. Williamson. 
J. G. Bell. 
3 
Mounted... 
Skin in ale. 
1.50 
5.00 
2.25 
2.92 
.80 
1.33 
1.45 
.33 
.09 
.60 
Dr. A. L. Heermann. 
SPERMOPHILUS FRANKLINI. 
Grey Gopher. 
Jlrctomys franklini, Sabine, in Linn. Trans. XIII, 1822, 587; pi. xxvii.— Ib. in Narr. Franklin’s Journey, 667. 
Harlan, F. Am. 1825, 167. 
Fischer, Synopsis, 1829, 343. 
Godman, Am. N. H. II, 109. 
Jlrctomys ( Spermophilus ) franklini , Rich. F. B. Am. I, 1829,-168; pi. xii. 
