Oct 1931 Amargosa Desert, 20 mi. SE Beatty, 2500 ft. Age Co., Nev. May 21, 1931 On edge of dunes; 25 Chaetodipus penicillatus on sand and gravel area; 2 Dipodomys deserti in sand and gravel area. One of the rats was tracked 50 yards away from traps. It had wandered in circles and was dead when found. Another lay along side of a trap, dead. The rat traps failed to catch anything. Heavy wind caused the shifting sand along the edge of the dunes to partly cover some of the traps. Last P.M. - shot a bat (Cephestrellus) Flying at a height of approximately 25 feet above the sand. Walls and caves a good many miles distant.