B. Davis 1935. Head Big Fork River, 7895 ft., Custer Co., Idaho, July 11 Cassin Purple Finches and Hermit Thrushes are common. The latter have been singing from the tops of the pines all evening. Mosquitoes are terrible! July 12 The gopher sets contained only 1 ?. Left some set and set-out the rest of my traps (9 sets out now). The last three sets were made on the steep, open east-facing slope of the hill west of the road. The grad. here is about 400 and consists for the most part of stony soil with a cover of Pentstamen and tall blue grass. The burrows usually run horizontally, following trails cut by grazing sheep, tho some do run with the slope. Heard several Sciurus richardeoni barking in the area near the creek. Spent about an hour hunting for them and saw two. Succeeded in taking 1 ? as she ran over the ground under Lodge Pole thicket. I looked at my gopher sets about every three hours and during the day took two more, both ?. Numerous earth cores and apparently deserted burrows are present, but occupied burrows are