Patelha 1943 Polioptila caerulea. June 12 2 mi SE Belgium, 1650 feet, Tehama Co., Calif. Fairly common on the north slope in the blue oak-manzanita and also in mixtures of scrub oak and chamise (Adenostoma). Pairs or singing males were met regularly. The species was not noted on the valley flats. June 13-15 Similarly distributed on the south slope, though perhaps not as abundant. The species was also observed in the black oak stand & the upper south slope (June 15). June 16-21 2 mi E Hayfork, 2400 ft., Trinity Co., Calif. Fairly common in the open stands of Ceanothus over a flats west of camp, as well as on slopes along Big Creek and Duncan Gulch. They appear to prefer the open areas of chaparral in which there is only an occasional tall deciduous tree here and there. They avoid the conifers. On the 16th, a family group of three young, perhaps two or three days out of the nest, were observed. The male was taken (#513). June 25-26 1 mi W Hyampom, 1200 ft., Trinity Co., Calif. Occasional individuals noted on the mixed oak-pine-madrone forest with scattered shrubs of manzanita, Ceanothus, Rhamnus and Rhus. Apparently uncommon.