Davis 39 1946 White Rock Ranger Station, 4800 ft, Trinity Co., Calif. to 2 mi. W. Hyampom, 1200 ft, Trinity Co., Calif. June 3, 1946 Picked up trap lines in a.m. Several lemusus maniculatus, which I discarded, and 1 Eula- mias jowensdii (1788) which I prepared. We broke camp, loaded the truck + pulled out at about 8:25 a.m. Stopped at Harrison Gulch on the way out while Dr. Miller looked over the yellow pine forest for a census plot. Russell and I caught some Rana b. boylii. We drove back to Placerville for gasoline, then turned back through Wildwood and onto Hayfork, where we picked up mail and groceries. From Hayfork we continued on to Hyampom, and established camp 2 mi. W. Hyampom, 1200 ft, Trinity Co., Calif. Our camp is located at the base of a grassy knoll which is terrorized by cattle. Below camp about 100 ft. is Carlin Creek, which is 6-10 ft wide and has a good flow of water. This area is at the base of South Fork But. The timber is mostly Douglas Fir higher up, but around camp there are Garry and Black Oaks, Douglas Fir, Yellow Pine, Scrub Oak, and some almost pure patches of manzanita. The timber is concentrated in small stands, mostly, alter- nating with open, grassy meadows, through many of which streams flow, diverted from natural streams by the ranchers. Aza result,