Boulevard, St 1942 Peromyscus maniculatus Apr. 2 Berglund Ranch, 1450 ft., 5 mi. N Corralitos, Santa Cruz Co., Calif. Traps set on two successive nights yielded 3 males and 3 females the first night and 1 male the second night. Traps were Museum Specials baited with walnut or a mixture of peanut butter and rolled oats. A line of 146 traps was set along the margin of a closed stand of chaparral edging the meadowy face of a north-facing hillside. The chaparral consists largely of Baccharis with some poison oak, Ceanothus sp. and deer clover (Lotus sp.). There is practically no cover beneath the brush - in some places a short carpet of grass. Apr. 4 Mud Creek, 800 ft., 3 1/2 mi. SW San Juan, Monterey Co., Calif. One was caught in a line of 134 Museum Special traps placed all the way around a hilltop on the edge of an open stand of Artemisia californica containing some poison oak, Baccharis, deer clover (Lotus sp.), and grass. The specimen was a female, nursing. Apr. 5 Five were caught in an open stand of shady live oaks with a thick undergrowth of poison, bracken, Artemisia, Baccharis, blackberry, elderberry, snowberry, coffeeberry, and bush monkey flower. One hundred-forteen traps were set here baited with a mixture of peanut butter and rolled oats. Mrs. Gimmell caught one male in chaparral along a fence near camp. Female. Apr. 7 Muddy Creek, 1 mi. S Chualar Canyon, Monterey Co., Calif. A trap line baited with a mixture of peanut butter and rolled oats was laid on a south-facing slope and around its base. One male was caught on the flat