"B. Richardson 734 Peromyscus maniculatus gambeli May 17 Temi C. Stadium 500 ft. Berkeley, Alameda Co., Calif. Caught three of this species on in a large rat traps in a rather open type of habitat as compared as compared to Peromyscus leucopus. It was by no means a an open piece of ground but instead there were scattered many clumps of brush and grass about leaving open spaces now of square. The other adult Peromyscus of this species was caught in a grass thicket under a group of bushes near a road. There was a moderately open character to all of the surrounding country. The other Peromyscus maniculatus was a sub-adult caught in and under a bush (Toyon) surrounded by scattered vegetation of grass, small