one cage at 9:30 this evening for feeding, a Cory was hanging (awoke) on the outside of it. All the caged bats were present and accounted for. For the following reasons I am almost certain that this bat was a wild one attracted into the Pearson basement by the caged bats: 1 It was a very gray specimen, much more so than any of our Shasta + Dickinson tree specimens. 2) It had several parasite flies (we have removed the parasites from our captures as we feed them) 3 all captive ones are accounted for. 4 Ventilating gaps in the brickwork could have admitted it. If so it is the first Berkeley specimen of Corynorhinus. Only possibility of error is that it is a Shasta or Dickinson specimen that escaped when we first arrived home a week ago. None were suspected of having escaped, however. Specimen 1468. Orcida, Contra Costa Co., Calif. Feb 19 Mary Koford and I put #20 Benow live traps baited with oatmeal on water company land in an abandoned circle on the north side of Bear Creek Road about 2 mi. east of the Orcida-Richmond highway. The thick grass and thistle habitat looked good for Meristus but saw no good recent tunnels or droppings. Set about 3 p.m. also 50 Sherman in grassy field in NW quadrant of Orcida crossroads. Said to have been many Meristus in Orcida region last summer, but saw no clear recent tunnels. Very little green vegetation.