V. Memmler 1943 Microtus californicus May 27, Gabilan Range, 1500 ft., 5½ mi. ENE Soledad, Monterey Co., Calif. Two ♂'s were caught in live traps on a grassy hillside. One was caught under Adenostoma in grass, the other in a runway in the grass. There are many runways present in the grass; I have set up runs before, but this was my first success at this locality. May 29, Two ♂'s were caught in Runs in dry grass about 1½ to 2 ft. tall. Snap traps were used. These were left out during the day before, but with no catch. These two were caught during the night. May 30, One ♂ was caught near a hole, but on a open area of ground and not in a run. This was near Lotus.