Smiley 1936 July 15 In traps set at: 2 1/2 mi. SE Hausen, 5200 ft. washoe Co., Nev. Caught 12 Peromyscus maniculatus, 1 Onychomys torridus, 4 Dipodomys microps. No traps set in evening. July 16 Moved Camp. Drove via Cedarville and Fort Bidwell to a point: 12 mi. Creek, 5300 ft., 1/2 mi. E Calif Line, Washoe Co., Nev. Set out 75 mouse traps on southern slope of valley (Slope 35) and above rim of boulders which formed rim of valley. On slope: Artemesia predominant; dark, compactible soil with an admixture of sand and small pebbles. Occasional large boulders on slope had rolled down as talus from rim rock; boulders up to six feet in diameter. Rim rock about 20 feet high. Of squarish boulders up to 12 feet high in for- stopping stones to the plateau above the valley. This rim rock probably is an exposure of basaltic columns now badly disintegrated. Plateau south of rim rock with, Picked up skull of Erethizon under Juniper. Junipers spaced approx. 40 feet apart. Soil: resembles fine clay washed in on angular rocks - latter very abundant 3 inches in diameter up to 1 foot - flattish. Artemesia present, not abundant. Traps averaged 20 paces throughout these habitats.