5 mi. W Cape Horn, 7000 ft., Sawtooth Range, Valley Co., Idaho. July 10, 1932 rock slide. When I would speak usually one or more animals would be heard answering 15-20 seconds later. When scared down beneath the rocks it was seldom more than 2-3 min. before they would come up again. I collected 5 individuals. Blanchard came back with 7 which he had shot farther up the mountain at the snow line in a similar granite slide. This totals 14 for the day. I placed out 40 mouse and 8 rat traps along the meadow, beneath willows and among the spruces and firs. The rat traps were placed in suitable places for Glemmys. At 9 p.m. a squirrel-like chuckle was heard to come from a lodge pole 20 feet from our camp fire. On examination a Flying Squirrel was seen climbing the tree and going out on the branches. It travelled so fast it was difficult to follow it with a flashlight. It glided from tree to tree with remarkable speed, reminding one almost of a bat in the moonlight. A light thud was heard when it would land. The animal as far as I could see seemed to lose very little altitude in gliding. July 11, 1932 The traps placed out last night contained only 1 gopher, 1 Microtus mordan (Jew.), and 1 Peromyscus maniculatus. No gophers were in the sets placed out yesterday p.m. Moved camp at 8a-m., going to Stanley and from there along the Salmon River almost to Clayton. The timber began thinning out more and more until only a sparse