Murray 1948 Journal June 22 Santa Rosalilieto, 25+ H., SE end Bahía Concepción camp under a Palo San Juan Set out 50 live traps in what might be called a cardon forest, with many of them and no other large growth. There was also pitahaya agria, cholla, ootillos and some low bushes. The ground was hard packed sand, some gravelly, and the whole area heavily overgrazed. The bats arrived in rather small numbers. There were Eptesicus and pipistrelles, none flying until rather late. Then most seemed to prefer to feed among the cardones. In one spot, where several grouped together, I was able to net 18 Eptesicus fuscus. The pool was about 8x5 feet and with its surface over 5 feet below the ground. On one side a ramped down to an edge blocked off for cattle to drink. Few bats came to it at dusk, but around 9:00 we found several there. After that one or two at a time would come every few minutes. Whether they would have drunk or not we did not know. Quest netted 3 Centrozous minor. There was also occasionally a small bat. Tonight still a bright moon.