UNIVERSITY OF CALIFORNIA PUBLICATIONS 
IN 
ZOOLOGY 
Vol. 5, No. 6, pp. 283-302, Pls. 27-29 February 12, 1910 
TWO NEW RODENTS FROM NEVADA. 
BY 
WALTER P. TAYLOR. 
(Contribution from the Museum of Vertebrate Zoology of the University of California.) 
The discovery of these rodents is a further’ result of work 
carried on in northern Humboldt County, Nevada, by a field 
party under the patronage of Miss Annie M. Alexander. Col- 
leecting was done in Virgin Valley and vicinity by Miss 
Alexander and Miss Louise Kellogg, and in the Pine Forest 
Mountains by Charles H. Richardson, Jr., and the writer. 
Callospermophilus trepidus, new species. 
Nevada Golden-mantled Ground Squirrel. 
Typr.——Male adult; no. 8240, Univ. Calif. Mus. Vert. Zool. ; 
head of Big Creek (altitude 8000 feet), Pine Forest Mountains, 
Humboldt County, Nevada; June 27, 1909; W. P. Taylor and 
C. H. Richardson, Jr.; orig. no. 768. 
DiaGNostic CHaracters.2—Larger than Callospermophilus 
chrysodeirus chrysodeirus (see table of measurements) except as 
regards hind foot; paler: under-parts lighter, nearly white; hair 
on feet lighter, almost pure white; lacking the wash of leht 
1This is the second paper based primarily on the results of the 1909 
SSA Expedition to Nevada. (See Univ. Calif. Publ. Zool., V, pp. 
2 Such general color terms as ‘‘fulvous’’ have been avoided; Ridgway’s 
Nomenclature of Colors has been used as the basis for color names, 
