UNIVERSITY OF CALIFORNIA PUBLICATIONS vasonian Ing 
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ZOOLOGY ze 
Vol. 17, No. 4, pp. 15-20, 1 figure in text October 3,\1916 
A NEW SPERMOPHILE FROM THE SAN 
JOAQUIN VALLEY, CALIFORNIA, WITH 
NOTES ON AMMOSPERMOPHILUS 
NELSONI NELSONI MERRIAM 
BY 
WALTER P. TAYLOR 
(Contribution from the Museum of Vertebrate Zoology of the University of California) 
Accumulation of specimens of antelope chipmunks (genus Ammo- 
spermoplilus) from the San Joaquin Valley, California, is now 
sufficient to permit a review of their systematic status, and this review 
demonstrates the existence of a new subspecies, herewith described, 
in the vicinity of Los Banos, Merced County. Occasion is taken also 
to comment on the distribution of Ammospermophilus nelsoni nelsoni, 
to make a contribution to its life-history, and to discuss its economic 
relations. 
The writer desires to thank Dr. Joseph Grinnell and Mr. Harry 
S. Swarth, of the staff of the Museum of Vertebrate Zoology, for 
helpful suggestions. 
Ammospermophilus nelsoni amplus, new subspecies 
Los Banos Antelope Chipmunk 
Type—Male adult, in summer pelage; no. 16693, Mus. Vert. Zool. ; 
20 miles south of Los Banos, Merced County, California; June 20, 
1912; collected by R. H. Beck; orig. no. (J. Grinnell) 1957. 
Diagnosis—Similar to Ammospermophilus nelsoni nelsoni but 
larger, paler colored, and with white lateral lines less distinct. 
Comparison—Summer skins of Ammospermophilus nelsoni amplus 
are paler than those of A. n. nelson’. Their dorsal coloration approx- 
imates light buff, almost whitish on nape of neck and sides of face, 
