Cogswell 1949 Geothlypis trichas Big Lagoon, Humboldt Co., Calif. Aug. 14 a female was found at the border of the tall Scirpus marsh, followed along until she was joined by a male. She had not responded to squeaks at all during my following her along 150 yards or so of marsh border; but when the two were close together (I apparently came from within marsh) both came up along the Tule stalks. I shot at the male, but got only 2 feathers. Both birds gave the typical "tchik" call; no songs. Aug. 18 6:50 a.m. at the edge of a thicket of Rubus parviflorus, R. vitifolius, R. spectabilis backed by alder and willow trees, fronting on pasture about 1/3 mile south of camp, I found an immature J & collected it. It seems strange that the many such thickets along Maple Creek valley near our camp are not occupied by more yellow throats. They seem to me to be very similar to areas inhabited by the species elsewhere (e.g. in San Gabriel River bottomland at El Monte, Los Angeles Co., Calif.).