The Alaskan Yellow Warbler in California
The Alaskan Yellow Warbler in Galifornia. Three specimens of Dendroica astiva rubiginosa are recorded by Oberholser (Auk XIV, Jan. 1897, p. 78) as taken by Mearns at Mountain Spring, San Diego County, May II, 1894. Mr. W. 0. Emerson has recently sent me three skins, undoubtedly referable to rubiginosa, taken by him at Haywards, October 4 and 7, 1898, and Sept. 14, 1900. These are readily distinguishable from fall skins of Dendroica astiva morcomi, the usual Yellow Warbler of California, by larger size, darker dorsal surface, and a well-marked buffy tinge on the under parts. The Alaskan Yellow Warbler may therefore be looked for during the spring and fall migrations at about the above dates. JOSEPH GRINNELL, Palo Alto, Cal. m&a rubiginosa
