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JULY, I9O3[ THE CONDOR IO5 Dendroica aestiva. .Yellow Warbler. Migrants, mostly immature, were seen at Big Sandy Creek the latter part of July. Dendroica nigrescens. Black-throated' Gray Warbler. Rather common in the higher parts of the Providence Mountains in June. Icteria virens longicauda. Long-tailed Chat. Found only in willow thickets in the lower valleys, such as that of the Colorado River and Big Sandy Creek. Noisy, as usual, in summer. Wilsonia pusilia pileolata. Pileolated Warbler. Seen migrating northward at Twenty-nine Palms, May I7, and below Ehrenberg, going southward in Atigust. Mimus polyglottos leucopterus. Western Mockingbird. I observed one at base of Providence Mountains, one at lower edge of the pine belt in Hualapai Mountains, two at Big Sandy Creek and several near Ehrenberg. Toxostoma curvirostre palmeri. Palmer Thrasher. Big Sandy Creek, rare. Toxostoma bendirei. Bendire Thrasher. Two shot at Beale Spring were the only ones observed. Toxostoma lecontei. Leconte Thrasher. Seen at Twenty-nine Palms; one shot at Danby (a small station on the Santa Fe R. R., in the Mobave Desert); two young of the year shot at base of Providence Mountains. Toxostoma crissale. Crissal Thrasher. Seen at a number of places, including The Needles, Little Meadows, Beale Spring, Big Sandy Creek, Bill Williams River and Hualapai Mountains. The latter was in a location totally unlike any in which I have previously seen this species, being in the lower edge of the pine belt, as an immature bird was shot at 6000 feet altitude, July 8, and a new nest was found in the pinyon and juniper belt a few days previously. Heleodytes brunneicapillus anthonyi. Desert Cactus Wren. Seen in Morongo Pass; shot at base of Providence Mountains; brood of young seen at Little Mead- ows; also seen at Beale Spring, Big Sandy Creek and near Ehrenberg. Not com- mon at any of these places. Salpinctes obsoletus. Rock Wren. Heard on Providence Mountains; a family seen below Beale Spring the latter part of June; rather common on Hualapai Mountains. Catherpes mexicanus conspersus. Canyon Wren. Providence Mountains and Hualapai Mountains; not common. Thryomanes bewicki leucogaster. Baird Wren.. Found only at Big Sandy Creek, where two moulting birds were shot about July 2o. Troglodytes aedon aztecus. Western House Wren. Seen only on the lower part of the Hualapai Mountains. Sitta pygmaea. Pygmy Nuthatch. Rather common in the pine forests of the Hualapai Mountains. Parus inornatus ridwayi. Gray Titmouse. I saw two in the Providence Mountains. Psaltriparus plumbeus. Lead-colored Bush-tit. i saw a small flock in the Providence Mountains at 630o feet altitude; they were rather common in the Hu- alapai Mountains up to 6500 feet altitude. Auriparus flaviceps. Verdin. Rather common at most localities visited except in the mountains. Polioptila caerulea obscura. Western Gnatcatcher. Seen in the Providence and Hualapai Mounta:ns, but not common in either range. Polioptila plumbea. Plumbeous Gnatcatcher. Little Meadows, several seen; Beale Spring, rather common; Big Sandy Creek, rare; Bill Williams River, rare; Ehrenberg, occasional. Sialia mexicana bairdi. Chestnut-backed Blnebird. Several seen, including spotted' young, near summit of Hualapai Mountains.