Quart 1948 Myotis yumanensis 2 May 3 Nulege 25+ ft Baja California scat at random for stuffing, 19 were females with one male. Of the seven bats I put up, all female. Two had embryos (no. 117 + 121 of the series 116-122 incl.) The beams from which the bats were procured are part of a large cement-floored porch about 40 yards long and 10 yards wide. The beams are about 12 ft off the ground. Bats were located yesterday afternoon by their squeaking. Two females were caught by Dr. Bonan, Murray & Tevis at the jail at dusk last evening. One was caught and two others seen yesterday in same room in which the Tadarida mexicana were caught. The Myotis were seen to enter a small crack in the ceiling in the opposite end of the room. 10:00 P.M. Two flew into the room we are using at 7:30 P.M. One hid in the ceiling im- mediately, but the other was kept flying by chasing it with a broom until 8:10 PM when the other returned with its hand notes. At the end of the forty minutes, the bat appeared to be tiring, its entire efforts being made in finding a place protected enough to rest.