Angus M. Woodbury has sent me a copy of the manuscript for "The Birds of Utah," by Woodbury, Cottam, and Sugden, from which I infer that the haunts, nesting, and other habits of the "western yellow warbler," as they call it, do not differ materially from those of the well-known eastern bird. They say of its status in Utah: "This yellow warbler is a common summer resident from early May to late August, the vanguard sometimes reaching here in late April and stragglers sometimes lingering into September, the latest record being September 23. It is primarily a bird of the riparian growths along water edges, either of streams, ponds or lakes or irrigated areas, particularly of the valleys and lower canyons, but occurs higher in the canyons in suitable habitat up to at least 8,000 or 9,000 feet. It does not seem to be attracted to large trees such as cottonwoods, but seems to prefer the more leafy shrubbery and small trees of developmental stages in ecological succession. In migration, it sometimes leaves this niche and may occasionally be found elsewhere. * * * "In nesting, it is usually found in a bush, chaparral or small tree stratum, seldom going to the ground or to the tops of trees. Its nests are compactly woven cups generally placed from 3 to 10 feet above ground, sometimes 15 feet, in rosebushes, willows, choke cherries, hawk-berries, oaks, young cottonwood or boxelder trees, usually within a short distance of the water's edge. The nest is usually composed of gray plant fibers, bark shreds or grasses and is usually lined with some downy substance such as cottonwood or willow cotton or hair." DENDROICA PETECHIA BREWSTERI Grinnell CALIFORNIA YELLOW WARBLER HABITS The 1931 A. O. U. Check-List gives the breeding range of this subspecies as the "Pacific coast strip from western Washington south through Oregon and California, west of the Great Basin and southeastern deserts to about lat. 30° in Lower California." It intergrades with _rubiginosa_ on the north and with _morcomi_ to the eastward, but exact boundaries are difficult to define. It seems to range well up into the mountains, for James B. Dixon tells me that he has found it nesting in Mono County, Calif., at altitudes of 6,500 to 9,200 feet. Dr. Joseph Grinnell (1903) in an interesting study of western yellow warblers, bestowed the above name on the California bird, for which he gives the following subspecific characters: "Resembling _Dendroica aestiva aestiva_, from which it differs in smaller size, paler (or less brightly yellow) coloration, and, in the male, narrower streaking on under surface; differs from _Dendroica aestiva rubiginosa_ in much smaller size and yellower coloration, and from _Dendroica aestiva sonorana_ in smaller size and much darker coloration."