Papa Leon Tree, 150+ ft., Depto. Lima, Peru July 4 (sat) The military apparently dug a hole for a well here. It is 1/2 yds. wide, reinforced with brick. We threw stones down & found it takes 4 1/2 seconds to reach bottom. After a while, a bat fluttered out. It was largish for a microchirptean and a light grey color. Perhaps it was a Desmodor. 9:00pm. We are back from gecko hunting. The air temperature is about 14° and the geckos we've caught manage to keep 4 or 5° above this. We caught about 7 of them. We noticed there is very little eye shine in geckos. They tend to freeze if spot-lighted. We heard heavy flutter of wings nearby us but didn't, weren't able to identify what flew. July 5 6:30 am The people of set traps checked them. Dr. Pearson caught 2 Phyllotis [illegible] in the arrays in small Sherman's. Ray caught 1 small Phyllotis [illegible] in a snap trap. No ants are seen during the day, but apparently there are hordes of tiny little nocturnal ants. Corn meal bait was often wiped clean by them. Ray's mouse had been eaten to a good extent at the ears, eyes, legs and tail by these tiny reddish ants. It appears to me that most of the life in this desert goes on at night. Bumbling owls, bats, insects, [illegible] fires, and