1918] Grinnell: New Mammals from the Mohave and Inyo Regions 429 
Callospermophilus chrysodeirus perpallidus, new subspecies 
Inyo Golden-mantled Ground Squirrel 
Type.—Mrale adult, skull and skin (in partially new winter pelage, 
otherwise worn breeding pelage) ; no. 27488, Mus. Vert. Zool.; 10,300 
feet altitude, near Big Prospector Meadow, White Mountains, Mono 
County, California; July 26, 1917; collected by J. Grinnell; original 
no. 4334. 
Diagnosis.—Resembles Callospermophilus chrysodeirus chrysodeirus 
of the Sierra Nevada, but general coloration paler; middle of back, 
rump and sides, more ashy in tone, head less richly tawny, and under 
surface of body whiter. As a result, the black dorsal stripes give an 
impression of greater sharpness. Resembles C. trepidus of the Pine 
Forest Mountains, northern Nevada, but tail shorter and coloration 
even paler. 
Material—F orty-five specimens, from the Inyo and White moun- 
tains, 7,000 to 11,600 feet altitude, Inyo and Mono counties, California. 
Southernmost station, Mazourka Canon, at 7700 feet altitude, in the 
Inyo Mountains directly east of Independence. 
Measurements of type—Total length, 265 millimeters; tail verte- 
brae, 90; hind foot, 39; height of ear from crown, 13. 
Remarks.—This is simply a pale desert-range race, probably cut 
off but incompletely from its near relative, chrysodeirus, of the Sierra 
Nevada. 
Ochotona schisticeps sheltoni, new subspecies 
White Mountains Cony 
Type.—Male adult, skull and skin (showing chiefly newly acquired 
winter pelage) ; no. 27560, Mus. Vert. Zool.; 11,000 feet altitude, near 
Big Prospector Meadow, White Mountains, Mono County, California ; 
July 29, 1917; collected by A. C. Shelton; original no. 3414. 
Diagnosis—Nearest like Ochotona schisticeps schisticeps in general 
coloration; tones of color fully as dark dorsally, but belly and tops 
of feet less pervaded with tawny; ears blackish, margined more con- 
spicuously with white. Cranium as in O. s. schisticeps, O. s. mwiri, 
and O. s. albatus (between which three Sierran races there appear to 
be no eranial differences) but with notably larger auditory bullae, and 
with brain-case higher, more curved dorsally as seen in profile. 
Measurements of type—Head and body, 188 millimeters; tail 
vertebrae, 8; hind foot, 30; height of ear from crown (inner base), 24; 
total weight, 132.5 grams; occipitonasal length of skull, 42.8 milli- 
meters; height of brain-case at bullae, 15.6; greatest cranial width 
ineluding bullae, 21.8; greatest diameter of bulla (diagonally antero- 
posteriorly), 13.7. 
Material—Thirty-nine specimens, all taken in the White Moun- 
tains, in Mono and Inyo counties, California, at altitudes ranging from 
8,200 to 11,900 feet. 
