Murray 1948 Eptesicus fuscus May 16 Triunfo, 1700 ft., Baja California Netted 3 c.amongue in a 2nd story room of an old brick compound, most of which had fallen down. The bats appeared from somewhere below, however, possibly scared out by our Mexican following. May 17 Same location Shot 2 flying over camp during heavy dusk. None appeared until it had begun to get dark, and they followed the Pipistrelles by quite a whirl. May 19 Same location Tevis and I returned to the same building of a few days previous. Found much fewer bats in the cracks of the ceiling which before had many Talarida. This time found 18? Eptesicus mixed in with the others, though both together. Put up both in formalin. Also shot 2 at dusk flying down the road by camp. When fairly dark two dove and circled around my head which I am sure were Eptesicus. May 23 Buena Vista, 250 ft., 23°38'N, 109°41'W, Baja Calif. Shot 2 flying down the road at dusk. Here The Eptesicus appear when it is nearing darkness, flying low and straight down the road in both directions.