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 Jan., 1912 BIRDS OF A MOHAVE DESERT OASIS 39 Passerella iliaca schistacea. Slate-colored Fox Sparrow. One flew in the well house at the mine September 22. Identified by Mr. Swarth. Pipilo maculatus megalonyx. Spurred Towhee. A pair were seen at the water hole September 24. I was unable to secure them but they were probably of this sub- species. Zamelodia melanocephala. Black-headed Grosbeak. A few birds seen during August. They made their spring appearance April 13. Guiraca caerulea lazula. Western Blue Grosbeak. These birds stayed longer and appeared later than the Black-headed. By October 1 they had all gone, not to re-appear till May 21. Passerina amoena. Lazuli Bunting. Very rare. Probably a dozen birds seen in August. In the spring they did not arrive until May 14. Progne subis hesperia. Western Martin. A pair was seen perched on the top of a dead cottonwood tree August 28, and one was secured. Petrochelidon lunifrons lunifrons. Cliff Swallow. Abundant in September, less so in October, after which they all left. They re-appeared again about the first week of May. Hirundo erythrogastra. Barn Swallow. Many seen flying around the water hole in company with Tree Swallows during August and up to September 15. Iridoprocne bicolor. Tree Swallow. Very abundant during August and Sep- tember. The first birds arrived in the spring February 17, then gradually became numerous again. Stelgidopteryx serripennis. Rough-winged SwallowJ Many seen around the water hole after June 1; several that I secured were juveniles. Bombycilla garrult. Bohemian Waxwing. One seen and secured December 13, as recorded in the CoNr)o, xiiI, 1911, page 34. Phainopepla nitens. Phainopepla. Not common. Seen throughout the year, though none were observed in their usual haunts from September to November 18. Lanius ludovicianus excubitorides. White-rumped Shrike. Very rare, an occa- sional one seen throughout the year either at the water hole, on the open desert or the mountain side. One secured August 14, compared with L. l. g'ambeli, is notice- ably paler colored. Vireosylva gilva swainsoni. Western Warbling Vireo. One seen and secured, September 15. Dendroica aestiva brewsteri. California Yellow Warbler. Seen twice, August 14 and May 2. Dendroica auduboni auduboni. Audubon Warbler. Abundant in the timber from September 10 to April 20. Geothlypis trichas occidentalis. Western Yellow-throat. Yellow-throats were quite rare residents. One taken January 17 has been identified by Mr. Swarth as of this form. Icteria virens longicauda. Long-tailed Chat. One seen May 3 and one secured May 21. Not uncommon in June and July. Wilsonia pusilla pileolata. Pileolated Warbler. Only seen on two occasions, two on April 16 and several on May 3. One secured April 16 has been identified by ' Mr. Grinnell as W.p. pileolata. /xnthus rubescens. Pipit. First seen at the river bottom November 3. After that date they became very abundant up to April 15, after which none were noticed. limus polyglottos leucopterus. Western Mockingbird. Two individuals seen during August and then none again till December 20. After that date they became plentiful around the water hole and frequently one would visit the mine.