Quest 1946 Pernathus spinatus 4 May 23 Brena Vista, 25' ft, 23°35'N, 109°41'W, Baja California One male and one female (#238, 239) caught in live traps set last night along brush fence surrounding a vegetable field in an arroyo (wash) north of camp. About twenty of the fifty traps were set along the fence, the remainder being set in the wash proper among the Lumbi, Palo Verde and Mesquite in likely looking spots. The brush fence only yielded mice, and only the about two were caught. One possible explanation for the low yield is that there was a full moon last night with no overcast. The female was lactating but contained no embryos. June 3 km N San Jose del Cabo, 250' ft, Baja California Two males and two females caught last night in live traps set along base of hillside, at border of sandy wash, 100 yards south of here. Neither of the females had embryos. Animals caught among rocks in which Lumbi, Mesquite, Cardone, Pitaya Dulce, and Prickly pear were growing. Specimens #306-309 incl. June 7 Punta Gasparino, 10' ft, 23°16'N, 110°9'W, Baja California Several caught in live traps last night by Murray and Teoi. Traps were set in beginning of rocky soil about 100 yds back of beach.