Sep., 1935 San Joaquin R., 3mi. N.E. Vernalis, San Joaquin, Co., Calif. Oct. 18, harrowed or plowed. Without further ado, we drove to the property of Mr. Ohm, where I camped for one night earlier this summer. Mr. Ohm's house is situated at the site of a town once known as Joaquin City. It, also, is no more. Mr. Ohm said that he had seen no more wood rats since the time of high water, but if we were interested in bats, he could show us where were "plenty". Accordingly, he led us up to the attic of his house. There on the tops of rafters and joists we found feed material of bats about one inch deep. On crevices behind joists, etc. were "numerous" bats which could not be reached by us even with the aid of forceps. After setting up camp out on the "bottomlands" approximately 1/4 mi. from Ohm's house, I set out 31 mouse traps and 14 rat traps. These all were placed near or along the face of the flood banks and under willow bushes (Salix sp.? ) and oaks (Quercus lobata) which are quite characteristic of this lower Sonoran, and Oregon ash (Fraxinus oregoni)