Gullion 1949 Cutamus sonomae -2- Sept 6 Red Mtn., 14 mi. S Hayfork, 5,300 ft., Trinity Co., Calif. and quite common. As at Brannan Mtn. it has an extremely high pitched note, sounding more like a bird's "chip" than that of a mammal. Its favorite habitat here as at Brannan Mtn. is the middle of a thick brush tangle. Here the brush is Ceanothus cuneatus and cordulatus . As before, these animals will scold for a long period of time but always out of sight in the middle of a brush tangle, and it very seldom shows itself out from the brush area. This animal will not become silent when one approaches but just keeps its extremely high pitched "chit-chit" going. Sept 9 same locality (9:50 a.m.) I collected on a sunny S facing slope covered with closely spaced Ceanothus cuneatus with scattered Jeffrey Pines and dense Bels and Gray Oak around. This animal was foraging under a Jeffrey Pine, in the shade, and ran for shelter in the Ceanothus. Sept 10 same locality Today, I found these animals to be common in the Brewer Oak and Ceanothus brush areas, but to be completely absent in any forest area from which those plants are absent; also it is left behind as one goes onto the higher barren slopes of South Dubabella Mtn.