SCIURIDA—SPERMOPHILUS. 825 
S. grammurus is well known to the residents about Camp Bowie, Ariz., “for 
its depredations on the hen-coops, its aim being the eggs, which it was often 
successful in carrying off”.* 
SYNOPSIS OF THE SUBGENERA, SPECIES, AND VARIETIES OF SPERMOPHILUS. 
I. Form Sciurine; skull broad inter- and anteorbitally; first upper premolar small, less or not more 
than one-fourth the size of the second; molars relatively small; edge of outer wall of the 
anteorbital foramina not thickened; coronoid processes of lower jaw long and slen- 
der; ears very large; tail long, full, and bushy (two-thirds of the length of head and 
ROM Yi) tea ce Seam eaine bak) os alee eee oe socace a su aeuslbeetoeurs OTOSPERMOPHILUS. 
1. Body finely mottled above with yellowish-brown and black ; beneath pale yellowish-brown ; tail 
below yellowish-brown, with three longitudinal bands of black, less distinct above. Runs 
occasionally into melanistic phases ....-. 2.22. -5 se 202. cee ene cece ce ew ee ences: GRAMMURUS. 
a, General color above mixed black and white, rather lighter on the anterior half of the dorsal 
surface, and more brownish posteriorly ; not distinctly whiter on the sides of the shoulders, 
nor darker medially on the nape and anterior portion of the back. Habitat, Colorado, 
southward into Mexico, and westward to the Sierra Nevada Mountains. ..-- var. grammurus. 
b. An indistinct broad hoary or grayish-white band on the sides, extending from the head to 
beyond the shoulders, and sometimes reaching the hips, narrowing posteriorly, broad 
anteriorly, and sometimes nearly meeting above on the nape. Habitat, Southern Cali- 
POL Wasa eer ee nae aloes Sar oe ei corat rere beetle wet tontices cet ls eeu est biceeleeiele var. beecheyi. 
c. Similar to the last, but with the hoary patches separated on the nape and over the shoulders 
by a band of dark brown, varying to nearly black. Habitat, Northern California and 
W EsberniOregonsore secesest ose Recess ascites oelsole ces cleecus Soebely as ans cscs Var. Couglasel. 
II. Sku.l abruptly narrowed interorbitally ; zygomatic arches heavy and spreading, transversely flat- 
tened; muzzle narrow; first premolar large, about one-third to one-half the size of the sec- 
ond; tail generally narrow and short, with the hairs one-fourth to one-third the length of 
the head and body; form rather thick and stout; ears small, often a mere rim,nearly con- 
Cealedibyzthespelatereemter ite ale cee as valea cale teenie tamtoel= == iale =a sielsisiote me le COLOBOTIS. 
2. Size large; above mixed black, white, and yellowish-brown, the white chiefly in crowded subquad- 
rate spots; upper surface of the head chestnut; beneath rusty-white; tail rather short, but 
full and bushy ; ears quite small. .........--. ---- .----- 22 +--+ eee ene ee ene e ee eee EMPETRA. 
a. Strongly rufous below and on the sides; back varied with black, brown, and white. Hab- 
itat, Barren Grounds of Arctic America......-.--------------. ------ +----+---- var. empetra. 
b. Above grayer; sides and beneath gray, generally with very little or no fulvous; tail shorter 
and more bushy. Habitat, Kodiak Island (and Peninsula of Aliaska?)- ..-- var. kodiacensis. 
e. Smaller and darker, the light spots more fulvous, and the tail and ears relatively longer. 
Habitat, British Columbia, southward into Washington Territory .-..--.var. erythrogluteus. 
3. Smaller; above pale yellowish-brown, varying to pale rufous, mixed more or less with black, 
with generally an indistinct mottling of yellowish-gray----..----. ---------- RICHARDSONI. 
a. Above light yellowish-brewn, varied with dusky, and generally faintly mottled with very 
small indistinct light spots; tail gray above, varied with black, brownish-yellow below, 
with a partly concealed bar of black near the end, and edged both above and below 
with yellowish-white. Habitat, Plains of the Saskatchewan, southward to Northern 
DI AROLAM Eee ee reeencae ooitaenicae cas sins seein aces 6s eine acldvivivicinsieinneimnnieninnine var. richardsoni. 
b. Smaller than the last, with larger ears, and much darker coloration ; tail mostly black above, 
edged with white; below with a broad subterminal bar of black, and another narrower 
basal one. Habitat, northern portion of the United States, from Dakota westward to the 
Plains of the Columbia, southward to the Laramie Plains, northward into British Co- 
LCE baie bins eisonin ads oodeeo Boe SeeIeeesor BPS OCR tCObaCs soot oso eRe GOSORRES var. townsend. 
4. Size small; ears obsolete; tail very short; above finely and uniformly variegated pale yellowish- 
brown and dusky, without spots; below gray, faintly washed with creamy-yellow. Hab- 
itat, Northern Utah and westward... .-----~----- +--+ e202 +--+ +--+ 2 ee eee eee e+ MOLLIS, 
* Rep. Wheeler’s Expl. and Sury. West of the 100th Merid. vol. v, Zool. p. 122. 
