I. Pleasor 1951 26 1 Seotomys, 2 Djifolops, 2 Perognathus, and 1 Onychymys, and also 2 spring & empty traps. Done here the 28th. June 2, 1951 Malpaso Creek, Monterey Co., Calif. Left early this am. to pick up frozen sea otter that washed up on Point Lobos. Watched sea lions for a hour or so at lunch, but could see no new pups. In mid-afternoon we visited the Malpaso Creek bat house. One cluster of Corynorhines at the ridgepole, and a single bat hung in the side attic. One or perhaps more escaped. One adult ?? was in the catch. 9 lactating, banded ??, and one female observed to be on April 22, was not lactating. One non- f (not lactating) was also present. The 10 young bats ranged from 3-23 days old. 7??; 3 ??. One of the lactating f was a 1-year-old. All the young 35mm foream (17 days old) and larger coeds fly. One young 34-- (16 days) "almost flew": June 7, 1951 1.3 mi S Diveras, Marin Co., Calif. Arrived at Golden's Bar about 3:30 PM, and as soon as we entered we could hear the bats. We think we caught them all. All told there were 56 ?? adults, 42 young, and only 2 unmarked f among the 56.