Quest 1948 Journal 83 May 25 El Carrizalito, 1400 ft, 5 mi N. Santiago, Baja California among the boulders, giving an impression of much denser vegetation than that north of here. To the east of her Limboi, Mesquite, Ironwood, and Palo verde form a dense covering to the flat valley floor. Wild life is very plentiful here. Birds heard and seen around the buildings were California Jay, Mexican Dove, White-winged dove, Cactus Wren, American Raven, Lila Woodpecker, and a large hawk. There are two water tanks on the hill about 75 yards west of camp. Tried Dr. Benson's technique of placing fine wires across the sur- face of the water, cross-crossed, and about two feet apart. Because of the sides of the tank extending above the water surface, the wires were about one inch above the water. In the tank we worked 3 Eptesicus fuscus and one Pipistrellus hesperus hit the wires and fell into the water where they were caught. Many of the slower flying Pipistrellus and possibly some of the larger bats hit the wires and water but took off from the surface of the tank before they could be caught. Trev's working with his net over the other tanks which is about 100 feet higher up the hill could several Pipistrellus hesperus and Myotis