Quest 1948 Macrotes californicus 1 April 17 Cerro Prieto 30ft 20mi SSF Mexicali Baja Calif. One caught by Dr. Benson in abandoned bamboo shack 50 yds from irrigation ditch situated in mesquite thicket. Bat was confused by flashlights (caught approx 10:30 PM) for it did not fly out of the large holes in the walls of the shack but circled within for about 5 minutes while Dr. Benson tried to net it. It was caught last night after seeing a few scattered large bats flying at dusk. April 29 Mission San Ignacio 500 Baja California Three caught by Dr. Benson in buildings attached to the mission at 10:15 P.M., to- night. Specimens were hanging from the domed stone roof singly. Three more caught (11:00 P.M.) by Tevis & myself in same stone domed room. Were hanging from roof. About five in all were in the room. Specimens put up by Dr Benson, Tevis & Murray. April 30 9:00 PM Three Macrotes found hanging in unused room with two openings to outside. They were very adept at flying up to the stone roof and hanging thus, wings separated from the body and hanging parallel to each sides while they gazed downward and occasionally wiggled their ears. One