August 1948 Journal 89 May 27 El Carrigalito, 1400 ft, 5 mi N. Santiago, Baja California Minimum temperature last night was 74° F, max - imum today was 87°. May 28 Location Minimum temperature last night was 70°F. The valley below us this morning was filled with fog, but the mountains in back of camp were clear of fog by daylight and brilliantly it- luminated by the sun. For some reason unknown to us, the bats were very common around the water tanks last night. I netted eight female Pipistrellus hesperus between 7:30 and 9 P.M. that were flying over the upper water tanks. Travis netted four female Pipistrellus hesperus, one Myotis californicus and one Corynorhinus at the same place and time, he working on the side of the tank opposite to mine. Murray netted several Myotis californicus and Pipistrellus hesperus in the same time interval at the lower tank. Dr. Benson netted 5♂ and two female Antrozous minimus in the building last night. We visited a pool high on the hill last night at 9:30 P.M. It was circular and about 20 feet in diameter and entirely surrounded by Palm trees. Dr. Benson said that he saw a bat (Lasiurus - Lasypeters?) leave one of the palms at dusk.