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24 THB CONDOR Vol. XV Taehyeineta thalassina lepida. Northern Violet-green. Swallow. Common at Colnett April 8. Verraivora eelata eelata. Orange-crowned Warbler. Male taken at Hole in the Wall April 5. Others, apparently of the same species, were seen at the same time and place. Vermivora eelata lutescens. Lutescent Warbler. Fairly common at Colnett April 8. One specimen taken. Vermivora eelata sordida. Dusky Warbler. Fairly common on Tedos Santos Island April 2 5 . Dendroiea auduboni. Audubon Warbler. Common. at Colnett April 7-8. (?eothlypis triohas arizela. Pacific Yellow-throat. Common at Colnett April 7-8. Anthas rubeseens. Pipit. Fairly common at Colnett April 8. ?imus polyglotres leucopterus. Western Mockingbird. Common at Colnett, and fairly common at the north end of Certes Island. In the latter locality they were very wild and we were unable to secure any specimens. Toxostoma redivivum. California Thrasher. Common at Colnett. Salpinetes obsoletus obsoletus. Rock Wren. Common on the mainland and on all the islands except San Geronimo. Not noted on the latter island. l?saltriparus minimus ealifornieus. California Bush-Tit. Chamaea faseiata henshawl. Pallid Wren-Tit. l?olioptila caerulea obscura, Western Gnatcatcher. The above three species were common on the mainland. '1?olioptila californica, Black-tailed Gnatcatcher. Abundant on the mainland.