Gullion 1949 Chamaea fasciata Aug 23 French Camp, 3100 ft., Humboldt Co., Calif. - yesterday and skinned today had what looked like a definite hood patch. Clt proved to be immature by the 1 layered skull and the general uniformity of the ovary, that is no yellow bodies or conspicuous follicles, suggests that it has not bred. There were no pin-feathers about the edge of the bare patch. - The other bird, the first one collected of this pair, is a male with a 2½ mm left testes, a 1mm right testes, a well developed hood patch and a 1 layered skull. Sept 4 3 mi N Willow Creek, 700 ft., Humboldt Co., Calif. - In this area there seems to be two distinct wren-tit populations. There are the birds on the valley floor, occurring mostly in rather moist habitats along stream courses etc; and there are other birds occupying 2000 to 3000 feet higher that are restricted to the Tan Oak - Manzanita undergrowth in open Douglas Fir-Tan Oak forest. In view of the apparent ecologic and to some extent (for wren-tit) altitudinal isolation, I wonder if 2 races aren't present in this area? The valley bottom form perhaps being of the coastal race, having come inland along the Klamath-Trinity River system.