142 University of California Publications in Zoology. [Vou.5 
North of the Santa Ana the species ranged commonly from 
Bluff lake around the margins of Bear lake, and all through 
Bear valley, nearly but not quite as far as the west end of Bald- 
win lake. It was abundant on the north slopes of Sugarloaf, 
down to the north base where the sage begins, about 7000 feet. 
I saw a number in Holcomb valley; but this was as far as it was 
noted towards the desert. At Bluff lake the earliest young we 
saw made their appearance above ground July 17 (1905). These 
were only about one-third grown, bright-pelaged, and behaved 
much like their parents. The latter paid no attention whatever 
to the youngsters, only giving a sharp alarm note if an intruder 
was sighted. 
This species acts much hke a ground squirrel, which it is 
in fact. They do not climb higher than the top of a boulder or 
low stump, where they sometimes sit bolt upright, motionless for 
minutes at a time. Save for the single sharp alarm note, they 
are quiet, very different in this respect from the chipmunks. 
They live in burrows beneath logs, rotten stumps or boulders 
and often out in the open, though there is seldom any mound of 
earth to mark the entrance. The last of August and the first of 
September at Bluff lake they were very active, gathering and 
carrying into their burrows quantities of green chinquapin burrs 
and berries of Ceanothus cordulatus. At the north base of Sugar- 
loaf earlier in August they were gathering cheek-pouches full of 
the seeds of a lupine and the smooth reddish fruits of a goose- 
berry. 
Just as we were leaving the mountains we trapped two of 
the young spermophiles alive, and brought them to Pasadena. 
They did not live harmoniously together in the eage provided, 
and early in the fall one killed the other. The remaining indi- 
vidual is yet alive and active. It now inhabits a rock pile in 
my mother’s yard. Each winter it has spent seven months in 
hibernation, though this period is occasionally broken for a day 
or two in warm weather. 
Nearly one-half of the 109 examples of this species preserved 
are young-of-the-year. The remaining 57 adults present the 
following measurements : 
