1934 7. General Account 24. Northwest slope of Grizzly Peak, Berkeley Alameda Co., Calif. Last evening I set 14 traps, 6 large rat traps and 8 small mouse traps. The mouse traps with the exception of three were set on a grassy hillside with scattered clumps of dry thistle as protection. Each trap was set near a small opening or burrow that had the appearance of recently being used by the presence of tails and freshly gnawed grass stems. On one of these traps a full grown Microtus californicus californicus. The bait consisting of oat meal was taken from two of the traps, but unseizing. The large traps, 6 of them, were set along the small stream which bordered by brush and a canopy of bay trees and a few oaks. These traps were set in likely looking trails in the brush or in at the base of trees containing wood