V. Memmler 1943 Rorognathus californicus May 28, Galilan Range, 1500ft, 5 1/2 mi. ENE Soledad, Monterey C. The ? had 5,8 mm ears. May 29, Four specimens were caught in the following places in live traps: one in dense Adenostoma on bare ground with no working present, 2 near holes at the edge of a small break in the Adenostoma, and one at the edge of the same break near freshly worked ground, but with no hole present. The break had the nature of a small meadow. It was about 75 yds long and 10 yds wide. Grass was growing in the middle as well as a Bur like thistle and Yellow Bloomeria. This meadow afforded good food for small mammals and the soil was bare around the edges of it for 3 or four yrs, before the Adenostoma became dominant. This area contained many holes and working. It was in this area that the 3 live traps which caught pocket mice were set. The one pocket mouse caught in dense Adenostoma was caught within about 10 or 8 yds of the break. May 30, One immature ♂ was caught in a snap trap set in a xerotus run on a grassy hillside with many blue bushes and Adenostoma. One adult ♂ was caught on a worked mound under the Adenostoma surrounded