Cogswell 1950 Troglodytes aedon June 24. W.end Donner L., 5940ft, Nevada Co. Calif - a pair carried food into an old woodpecker hole in the trunk of a live aspen tree near the inlet creek. The ♂ sang only occasionally. Food calls of young were heard in the nest. Foraging seemed to be done mostly in the root tangles & dogwood thickets along the creek & only occasionally in the adjacent open forest of lodgepole & Jeffrey pine. June 25 - S. & S.W. sides of Sierra Valley, 4300ft, Sierra Co. Calif- about 5 heard singing from house & yard areas, in small towns & about farm buildings. July 7 near Sugar Bowl Lodge, 7100 ft; 1.2 mi. 55W Donner Pass, Placer Co. Calif. 1 seen in willow thickets near clumps of firs & pines at edge of forest. The bird gave the grating call char- acteristic of this species, but no song. I am reasonably sure it was not present here a week ago, & this occurrence probably represents up. mountain dispersal. NE side Mary Lake, 7100 ft; 1/3mi 55W Donner Pass, Placer Co. Calif. I heard calling (grating note) from bitter cherry & twinberry thickets under edge of lodgepole pine - red fir forest. July 11: 6800 ft. 4mi. 5W Donner Pass, Placer Co. Calif - 1 seen in manzanita & ceanothus (candelatus + velutinus) chaparral & in lower branches of Jeffrey pines on S-facing slope of flattish ridge. July 17 { near Sugar Bowl Lodge [see above] - 2 seen together in same 19 area as on July 7( or 17th ); 1+ here on July 19 & 20. II:32 N.of July 21 Emigrant Gap, 5000 ft., Placer Co. Calif - 1 in Ceanothus integerrimus brush along road in sugar pine, incense cedar forest on N-facing slope. Maples & dogwood nearby.