Murray 1948 Myotis velifer May 16 Triunfo, 1700ft., Baja California Found an old brick compound in town, mostly in ruins but having one second story room intact. It had plaster walls, lacking one, and a wooden ceiling with beams running across. These had spaces between of 1/2 to 3/4 inches, filled with bats. Almost all were Tadarida mexicana except 2 Myotis that we saw - caught both May 21 Buena Vista, 25±ft., 23°38'N, 109°41'W, Baja Calif. Shot one flying down the road when almost dark. Bats were very scarce here tonight. May 24 Sac Cuevas, 23°34'N, 109°39'W, Baja Calif. Near the town was a large cave washed out of a high sandstone cliff. At the rear were velifer packed very tightly together over about 60 square feet of the wall and roof. They were cold and inactive at first, making little noise and very few flying. When caught they crawled on the floor rather than flew. Later they warmed up and made a chime of chittering. Caught 27. Also present were Natalus mexicanus in a crevice and a few Macrotilis californicus which were among the velifer yet all together. (see journal)