Murray 1948 23 Journal Apr 17 Cerro Prieto, 30 ± Ft., 20 mi SSE Mexicali, Baja Calif. the way up the mountain, in large rocks, in front of a woodrat burrow with fresh droppings. A very warm night tonight with wind which died down later. Apr 18 Same location The 15 mouse traps had nothing, with two of them sprung. Six Schuylers in the crates contained 1♂ Neotoma lepida, and the one on the hillside had one also which was discarded because of a crushed skull. In the 50 live traps were 1♂1♀ Peromyscus crinitus plus one immature which was released. After putting up the mice we moved camp back to the irrigation ditch where we were before. This evening just before dusk, over 100 black-necked stilts flew overhead. Heard a kleeen in the distance when almost dark. Dr. Benson shot an Eptesicus fuscus. That makes four species of bats from this spot, the others being Pipistrellus hesperus, Myotis californicus, Jadarada mexicana. What was undoubtedly a Eumops was seen. Maximum temperature today 97°. Very pleasant tonight except for mosquitos.