Quest 1948 Journal 43 April 29 Mission San Ignacio 500 ft. Baja California. the old mission. In another room adjoining it and a neighboring room 3 Macrotus were caught by Dr. Benson [10:15 P.M.]. The mission is very well built and in a good state of repair, and in use at present. April 30 9:30 P.M. Minimum temperature last night was 53° F. 13 Myotis yumanensis were captured this afternoon in an unused stone storoom east of the mission, and three Macrotus californicus and one Tadarida mexicana were seen this evening in the unused rooms adjoining the mission (see species accounts). The Canyon wren captured last night escaped late this morning, but not after another was heard and seen on the mission walls. San Ignacio is surrounded by volcanic rock in a layer over what appears to be sandstone or limestone. May 1 Minimum temperature last night was 58° F. Bats seen last night before 11:00 P.M. in mission rooms have been Myotis yumanensis, Tadarida mexicana, Antrozous, and Macrotus californicus.