Quest 1948 Journal 94 May 30 El Chorro, 800+ ft, 2 mi W Agua Caliente, Cape District, Baja Calif. around the pond at the dam. The wash area and canyon walls are grazed by cattle. Shot bats last night here at dusk. All I obtained was two female Dasypus ega. Dr. Benson shot 2 Tadarid mexicana, 4 Tadarida femorosacca and two Dasypus ega. Teris and Murray got 4 Dasypus ega and one Pipis- trellus hesperus. The first bats seen were the small Pipis- trellus hesperus, followed immediately by the larger forms. All were flying east and by the hundreds, it looking like a mass bat myrati; for a period of a half hour. At first all were flying high, even the Pipistrellus appearing to be out of gunshot range, but before dark they began to fly much lower, especially within the canyon. The Tadarida femorosacca were easily distinguished by their rapid flight, large size, and long narrow wings. The Dasypus ega, also of large size, had much broader wings and flew much slower, and with far less wingbeats per second. The larger Tadarida were hard to hit and stop with no. 10's in the 16 ga shotgun, a very large number of shells being expended for the number of bats obtained. A Least Grebe was seen in the pond above the dam yesterday afternoon.