OCT., 1899.] MAMMALS. 91 
chipmunks and we often saw them in the trees 40 or 50 feet above the 
ground, moving about in the branches or chasing one another around 
the great trunks of the hemlocks and firs. At our camp in the alpine 
hemlocks on Squaw Creek they were the most abundant and most fear- 
less of the diurnal mammals. Here they were constantly associated 
with the less abundant golden-mantled ground squirrels (Callospermo- 
philus chrysodeirus), compared with which they are bolder, more active, 
more graceful, and more interesting. 
In camp they made frequent visits to the mess box, which they 
clearly regarded as public property, approaching it boldly and without 
suspicion and showing no concern at our presence—in marked contrast 
to the golden-mantled ground squirrels, which approached silently, 
stealthily, and by a circuitous route, in constant fear of detection. If 
disturbed while stuffing their cheek pouches with bits of bread, pan- 
cake, or other eatables, each chipmunk usually seized a large piece in 
its mouth and scampered off, returning as soon as we withdrew. In 
fact, they made themselves perfectly at home in camp, and evidently 
ranked us with other harmless inhabitants of the forest. They climbed 
up the sides of our tent and over towels hung to dry on branches, as if 
such things had always been a part. of theirenvironment. It should be 
added, however, that the most familiar animals were always the young 
of the year, which probably had no recollection of the time before our 
arrival. 
Along the upper border of the timber, where the ground is more 
open and is covered with gray rocks and pumice instead of the dark felt- 
ing of hemlock and fir needles and cones, the chipmunks are far more 
alert and wary. 
After the middle of September the adults were rarely seen, and after 
the 20th the young came out only during the warmest part of the day. 
At Sisson, R. T. Fisher found these chipmunks more abundant than 
any other mammal. They were common in the woods, in the chapar- 
ral, on the hillsides, and in the bottom of the valley. At the time of 
his visit—from the end of August to the middle of September—they 
were in the molt and very ragged. 
Sciurus albolimbatus Allen. Sierra Pine Squirrel. 
[=S8. californicus Allen, preoccupied.] 
Common in the Canadian zone forest of Shasta firs, and in the Transi- 
tion forest of mixed pine and Douglas spruce. Among the Shasta firs 
they were seen on all sides of the mountain and came up as high as the 
lower edge of the alpine hemlocks. Among the pines and Douglas firs 
they were seen as low as Bear Butte, near Squaw Creek Valley, and 
were common at Sisson and thence northward along the base of the 
Scott Mountains. Like other pine squirrels they lay up stores of cones 
for winter use. At low elevations theyrival the large gray tree squirrels 
in collecting the seeds of the huge cones of the sugar pines. At higher 
