Riteka 1943 June 14 2 mi S E Beegum, 1650 ft., Tehama Co., Calif. Ours lactating female taken on a patch of bare soil near the base of an Adenostoma shrub where there were three entrance holes big enough to have been made by Dipodomy. Adjoining the several square feet of bare soil was a patch of dried grass. The soil was brown, fairly loose, with an admixture of a gray, shale-like rock weathered to a gravel consistency. The bait with which the Aerognathus was caught was a mixture of oatmeal and sainfoin. This specimen had one pair of pectoral and two pairs of inguinal mammae. The general location of the catch was a fairly steep, south-facing slope about 50-60 feet above the edge of the slope. The general vicinity was vegetated with scattered shrubs, predominantly Adenostoma but including scrub oak and junya. There were a few yellow and digger ferns among the scattered shrubs.