316 Notes on a Collection of Mammals. {ZOE 
at the summit. The chief timber is the tamarack pine, nus 
contorta, which still forms heavy forests along the sides of the 
valley though much of it has been cut away since the coming of 
the railroad. On the high ridges, a thousand feet above the 
valley, are found scattering groves of a beautiful fir, 7sugo 
Williamsoniz. Along the stream which wanders through the 
valley grow thickets of a dwarf alpine willow and alders; often 
about these in the grass were runways of meadow mice or voles. 
It was in this valley that I first found the curious alpine spermo- 
phile, Spermophilus beldingi. ‘The gilded chipmunk Spermo-_ 
philus chrysodetrus was also abundant in the rock ledges. 
Mt. Tallac, about which the greater part of the collection was 
made, is nearly 10,000 feet in altitude and lies a few miles south- 
west of Lake Tahoe. The western slope is not precipitous like 
the eastern side, and is well timbered in places, chiefly with 
tamarack pine, a few grovesof Williamson’s fir and P:nus flexiilis, 
the latter a dwarf snow-crushed pine, bearing five leaves and 
small purple cones, and found only on the highest peaks and 
dges. There are many boggy springs along the mountain 
slope, about which flourish alder and willow thickets. It was 
in these places that I found the only traces of the weasel, 
Putorius arizonensts (?). Several mammals, including the gray- 
headed pika, Lagomys schisticeps, the yellow-bellied marmot, 
Arctomys flaviventer, and two or three — of 7Zamias, were 
found commonly high up among the roc 
From Mt. Tallac I made a hasty three pea trip into the Carson 
Valley, Nevada, obtaining there specimens of Arvico/a and 7amias. 
A large hare, Lepus texianus, and the antelope squirrel, Spermo- | 
philus leucurus, were common on the sage plain east of the valley; 
along the eastern base of the Sierra Nevada I saw several speci- 
mens of a large bushy-tailed spermophile which was probably 
Spermophilus grammurus. 
I failed to obtain specimens of many common species, either 
through lack of time or accident; these species with others com- 
monly known to the trappers will be enumerated at the close of 
the list. I have taken advantage of the identification by Dr. J. 
A. Allen of some of this material submitted to him by the 
Museum, and Iam also greatly indebted to Prof. C. H. Gilbert and 
