Rustoon 1947 Journal 28. Sept 13 8mi W, 3mi N McKittrick, 2100ft, Kern Co, California on some steep hillsides. In other places there is an even sparser growth of Eriogonum and ... with some ....... Birds are abundant in the canyon bottom probably due to the fruit and to the water from the tanks farther down the canyon. After lunch went out & shot birds. Besides those skinned I got a Black-throated Sparrow, Amphispiza bitemata which was in the height of the moult and too badly shot up for even a skeleton. In the evening set 75 new spec. traps on east-facing slope of small side canyon to North of camp. The traps were spaced 7 paces apart in an almost pure stand of Haplopappus. After supper had a swim in the tank down the canyon. Saw a few bats but didn't get a shot. Also heard Squirrel calls. Sept 14: Ran trap lines before breakfast yielded 18 Perognathus californicus (9?, 9? noemb.) and the tail of another. Also 3 Peromyscus maniculatus 2? (7 usmb, 1 P. true & 4-20mm emb.), and 1 ? Dipodomys. The abundance & dominance of Perognathus is new in my experience. They were seeds in the cheek pouches, mostly a small brown diot. seed but some grass & a few Haplopappus seeds. Did mammals til noon then went out after birds. Collected mocking bird & 2 bells parson & 1 Brown Towhee near camp. In late afternoon set out 36 Museum Special traps on West facing slope (7 paces apart, Walnut bait). Opposite slope I trapped last night. Here the surface of the ground is almost all broken shale with some small scattered brush - Eriogonum and some small composites.