Pearson 1970 Aug. 10 Orinda, pasture across road from my home, Contra Costa Co. My 1-meter enclosure following a summer of fairly high insecta population: surroundings are dry thistle, scattered dry mustard, dry small grasses, a few dry common stobles on downhill side, a few short oats up to 26" high. also a few still-green bristly ot-tongue, Eriophium paniculatum, and possibly lettuce. Lots of sunrayz and white-maiz just outside the wire. Inside: lots of dead- years stobles of oats and common leaning against wire, lots of oats, some with stobles as thick as a pencil and 5 feet tall, quite a bit of Elymus (more detailed), a few tall sprigs of rye? grass. No mustard, no common, no thistle, nothing else; good thistles mouse cover. Sandy's oat enclosure (Aug. 31): outside mostly med.- sized oats, a few mustard, a few soft-tanks, 2 or 3 possibly lettuce, other grasses but no Elymus. Inside cut-off thistle the enclosure med. oats, 2 prickly lettuces (one 4 ft tall), Hesperia thistle, fat tail, other grass, some goofles digging, one mustard, dried legume. Sandy's Elymus enclosure: mostly Elymus, mixed with light grasses and maybe 10 deer-cropped prickly lettuce, no oats, a few thistles, no mustard for 2 meters. Inside: 5 deer-cropped prickly lettuces and one 3-foot uncropped one, several oats up to 4-1/2 feet and several others cropped, Elymus (the greatest around), a few thistle, and light grasses (brame and Sandy's thistle enclosure: outside is thistle + oats plus a smattering of brame, cropped prickly lettuce, a few