"Pitelka" 1943 Oporornis tolmiei June 18 Zonie Hayfork, 2900 ft., Trinity Co., Calif. A male observed in a dense thicket of Rubus, Rosa, and Cornus in a morast at the base of pocket on the west-facing slope along Big Creek. June 19 Hayfork Valley, Trinity Co., Calif. Noted thickets of Cornus, Cornus, Salix and manzanita: from about 5000 ft. upward. Not common. Male One observed performing a flight-song. The sounds included the usual song-notes plus additional notes interspersed so that the total effect was one of more or less twittering. The bird rose and fluttered its wings during the song, descending as he sang; then he resumed normal flight and dived into the chaparral. The flight-song began about 40 feet above the ground. It reminded me of a similar flight-song, asregard the flight itself, in Geothlypis trichas.