Chaparral hillsides and brushy open woods are the favorite haunts of the Lutescent Warbler. Its nest is built on or near the ground, usually in a bramble tangle or under a rooty bank, and the bird itself hunts near the ground, flitting here and there through the miniature jungle of wild lilacs, baccharis and hazel bushes. Its dull greenish color harmonizes with the dusty summer foliage of our California chaparral, and with the fallen leaves and tangle of stems that constitute its normal background. It impresses one chiefly by its lack of any distinctive markings, and the young of the year, particularly, approach that tint which has been facetiously called "museum color." Ordinarily the crown-patch is invisible as the little fellow fidgets among the undergrowth, but at a distance of 3 feet Mr. W. L. Finley was able to distinguish it when the bird ruffled its feathers in alarm. In May, 1911, while I was waiting in Seattle, Wash., to take ship to the Aleutian Islands with R. H. Beck and Dr. Alexander Wetmore, we were shown by Samuel F. Rathbun the haunts of the lutescent orange-crowned warbler around Seattle. He says that it is one of the more common warblers of the region and is widely distributed. It favors small deciduous growths in more or less open situations, with or without accompanying evergreens. "It is also partial to the edges of old clearings fringed with a deciduous growth." He says that it is an early migrant, arriving early in April or sometimes in the latter part of March, and departing in September. On Mount Rainier, according to Taylor and Shaw (1927), it was-- fairly common in the Hudsonian Zone (4,500 feet to 6,500 feet); occurs also, but more rarely, in the Canadian Zone between 3,500 and 4,500 feet. * * * The lutescent warbler was commonly found in the mountain ash, huckleberry, azalea, and willow brush, principally in the open meadow country of the subalpine parks. Warm and sunny south-facing slopes were favorite places of resort, especially after a period of cold or fog. Occasionally the bird was found in patches of Sitka valerian; at other times in the lower branches of alpine firs. His summer foraging seems for the most part to be done within 10 feet of the ground, though in the fall, when migrating, he apparently takes to the tree tops.