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May,?9o7 monly found in the sycamores and cottonwoods along the rivers. May 3 to June 7. Euphagus cyanocephalus. Brewer Blackbird. Very common resident, nesting in small colonies of perhaps a dozen pairs most anywhere. April 15 to June 10. Carpodacus mexicanus frontalis. House Finch. Common resident, nesting anywhere. April 2 to July 20. Probably three broods are raised. Astragalinus tristis salicamans. Willow Goldfinch. Common along the river in San Pasqual. Varying greatly in nmnbers according to season. After a wet spring with late rains, when the river is running well into the summer, they are almost wholly lacking in sections where a dry season finds them most plentiful. May 4 to July 21 (advanced). Two broods may possibly be raised. Astragalinus psaltria hesper0philus. Green-backed Goldfinch. Very com- mon, nesting in small colonies in the orchards and indeed most anywhere. Two, possibly three broods are raised. April 22 to July 21. Astragalinus lawrencei. Lawrence Goldfinch. Not uncommon summer visi- tant, nesting in colonies of a few pairs in the orchards and other suitable places. One brood only, as a rule. April 12 to May 25. Chondestes grammacus strigatus. Western Lark Sparrow. Very common resi- dent, nesting most anywhere, on ground, in low bushes, trees or vines. March 27 to July 6. Two, possibly three, broods are raised. Spizella socialis arizona,. Western Chipping Sparrow. Rather uucommon in Escondido. Not seen in San Pasqual. Common in higher interior valleys, nesting in first part of May. May 5 to 11. Spizella atrogularis. Black-chiuned Sparrow. A nest with three eggs found near my house on June 12, 1905, and kindly presented to me by Mr. C. L. Pauter of Escortdido has been indentified by Mr. E. J. Horgan of the U. S. Nat. Museum as being undoubtedly of this species. It is the only record of the appear- ance of the species here that I have heard of. Amphispiza belli. Bell Sparrow. Very rare. Only two definite records from San Pasqual. Nests were found by myself in 1905 (June ?8), and by N. K. Car- penter on May 27, ?906 (advanced). Aimophila ruficeps. Rufous-crowned Sparrow. Very rare. Only positive record is that of a nest with two young and two almost pipped eggs found on March 11, 1900. Said to have been not uncommon in the earlier days when the hillsides had not been cleared of brush. Melospiza cinerea cooperi. Sau Diego Song Sparrow. Common resident. Very plentiful in San Pasqual along the river. April 14 to July 18 (advanced); two broods, possibly three. Pipilo maculatus megalonyx. Spurred Towbee. Not a very common resi- dent. Rather rare in Escondido but found more commonly in San Pasqual. March 11 to May 10 (young). Pipilo fuscus senicula. Anthony Towhee. One of our most common residents. Found everywhere. March 19 to July 12. Zamelodia melanocephala. Black-headed Grosbeak. A very common summer visitant, nesting mostly in the willows along the rivers. April 28 to July 2. Guiraca ca?rulea lazula. Western Blue Grosbeak. Rare. Has been found nesting in both Escondido and San Pasqual. May 5 to June 26. Cyanospiza amcena. Lazuli Bunting. Common but somewhat irregular in its appearance. April 30 to June 2. Progne subis hesperia. Western Martin. Very rare. Only one pair known to nest in Escortdido. These for many seasons returned to the same cavity in a sycamore standing beside a barn on a fruit ranch here, but have been missing now for two seasons.