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THE CONDOR VoL. IX Petr0chelid0n lunifr0ns. Cliff Swallow. Very common visitant in summer, nesting around the buildings, occasionally on the large boulders on the hillsides. May 3 to July 21. Two broods sometimes raised. Phain0pepla nitens. Phainopepla. Not uncommon, but rather variable as to nmnbers. Seen in greatest abundance in 1902. Since then there seem to have been fewer of the species here. May 8 (far advanced) to July 4 (young). Lanius lud0vicianus gantbeli. California Shrike. One of our common resi- dents, nesting most auywhere in trees or brush-piles. Often three broods are raised in a season. March 5 to June 22. Vireo gilvus swains0ni. Western Warbling Vireo. Not uncommon around tipper end of Escortdido Valley. Not seen in San Pasqual yet, tho it probably occurs there. One brood only, in early June. Vireo pusillus. Least Vireo. Very common in the willow groves along the rivers. Two broods may possibly be raised. April 24 to June 18. Dendr0ica a?stiva. Yellow Warbler. Not mmommon in Escortdido but rather rare in San Pasqual. May 18 (far advanced) to June 20. Geothlypis trichas 0ccidentalis. Western Yellow-throat. Not uncommon along the river in San Pasqual; rare in Escondido. May 18 to June 14. Icteria virens 10ngicauda. Long-tailed Chat. Quite common along the river in San Pasqual. Rarely seen at any tinhe in Escortdido. May 10 to June 4. Wils0nia pusilia chryse01a. Golden Pileolated Warbler. Only one nesting record in San Pasqual: June 16, 1901. Mintus p01yg10tt0s leuc0pterus. Western Mockingbird. One of commonest residents. Two, often three, broods are raised. April 5 to June 4. T0x0st0nta redivivunt pasadenense. Pasadena Thrasher. One of our com- mon residents. Two broods, possibly three, are raised. February 18 to June 13. ttele0dytes brunneicapillus c0uesi. Cactus Wren. Common resident; almost every good-sized cac.tus patch has its pair of wrens. More common in San Pas- qual. April 16 to Juthe 2; possibly two broods. Catherpes ntexicanus punctulatus. Dotted Canyon Wreu. Not common; found only in a few of the more rocky ravines rulming up from the valleys. April 8 to April 17. Thry0ntanes bewickii charienturus. California Bewick Wren. Not unconllnOn ' in the willow groves along the river in San Pasqual. Rather irregular in abun- dance. Quite common in 1900 and 1901, much less so since, and in some years hardly seen. April 14 to June 2. Trogl0dytes aed0n parkntani. Parkman Wren. Very common iu the willows along the rivers; to a lesser extent among the oaks, even when near the river. April 16 to June 12. Possibly two broods. Bae010phus in0rnatus. Plain Titmouse. I found this species nesting at Crescent Valley at 250 feet elevation on April 14, 1906. This is the only record. This bird is common among the oaks in the higher mountains but never comes into the valleys. Mrs. Bailey found it breeding in May, 1889, and in June, 1894, at Maj. Merriam's ranch at Twin Oaks (Auk XIII, page 115) which is at about the sanhe elevation as Escondido (750 feet) and a few miles north. That might perhaps be explained by the fact that the ravines at Twin Oaks are much more thickly wooded and were especially so at that time, with a fine grove of large oaks on the Merriam ranch such as one cannot find now-a-days in Escondido. Both records are inter- esting as the species seems to be most at home at a higher altitude. Chantaea fasciata henshawl. Pallid Wren-Tit. Common in and near the bushy ravines and on the higher hillsides. March 11 (young) to Ma 7 23,