OCT., 1899.] MAMMALS. 91 



chipmuuks and we often saw them in the trees 40 or 50 feet above the 

 grouud, moving' about in the branches or chasing one another around 

 the great trunks of the hendocks and firs. At our camp in the alpine 

 hemlo(;ks on Sc^uaw 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 squirrela {Gallospernio- 

 philus chry,so(lcirus)j 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, [f 

 disturbed while stufting 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 their environment. 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 l)efore 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, 11. 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. 



Sciurns albolimbatus Allen. Sierra Pine Squirrel. 



[ = *S'. californicus Allen, preoccupied.] 



Common in the Canadian zone forest of Shasta firs, and in the Transi- 

 tion forest of ndxed 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 they rival the large gray tree squirrels 

 in collecting the seeds of the huge cones of the sugar pines. At higher 



