90 PACIFIC COAST AVIFAUNA Xo. 7 



mountains and higher foothills. Of late- years, seems to be increasing in numbers 

 in the lowland towns, nesting in crevices in buildings. Leaves mostly in Sep- 

 tember and arrives in late March and the month of April. Several seen by 

 II. S. Swarth at Long Beach, Los Angeles County, March 24, 1904. Recorded 

 by B. W. Evermann as a moderately common summer resident of Ventura 

 County (Auk m, 1886, 183), and found breeding at Santa Paula, Ventura 

 County, by II. C. Burt. P. I. Osburn reports several pairs nesting yearly in 

 crevices in the Hotel Mankind in Pasadena. This colony numbered about 

 thirty pairs in 1909 (Condor xi, 1909, 208). Two sets, of five eggs each, were 

 taken by R. M. Perez and G. K. Snyder from under the eaves of a school 

 house in Los Angeles, June 2 and 17, 1910 (Condor xn, 1910, 133). J. Dixon 

 took four fresh eggs at San Onofre, San Diego County, May 30, 1904, and 

 noted several other pairs of birds in the same locality (Condor vin, 1906, 95). 

 C. S. Sharp found a pair breeding at Escondido (Condor ix, 1907, 89). 



302. (612) Petrochelidon lunifrons lunifrons (Say). Cliff Swallow. 

 Abundant summer resident from the lowlands up to 7500 feet in the 



mountains. Breeds, ordinarily, from April to Jul}', at least two broods being 

 raised in a season. Earliest in the spring in Los Angeles County noted by 

 W. M. Pierce in San Antonio Canon, February 15, 1904. Latest in the fall 

 noted by J. Grinnell at Long Beach, September 7, 1895 ( Pub. 2, Pasadena 

 Acad. Sci. 1898, 41 ). Sometimes remains considerably later, however, as E. 

 Davis found a nest containing three fresh eggs on the coast of Orange County, 

 September 1, 1894 (Nidiologist II, 1894, 30). J. G. Cooper noted the species 

 at San Diego from March 15 to October 5 (1862) (Lands Bds. Cab. 1870, 

 105). I observed them nest building on a barn near Compton, Los Angeles 

 County, March 26, 1910, and found them nesting abundantly on the trunks 

 of pine trees at Bear Valley, San Bernardino Mountains, in June, 1907. 



303. (613) Hirundo erythrogastra Boddaert. Barn Swallow. 

 Common over the lowlands and foothill country during migrations, which 



occur mostly in April and September. A few remain through the summer and 

 nest under bridges or in caves along the coast and on the Santa Barbara Islands. 

 Antonin Jay took two sets, of four eggs each, near Santa Monica, Los Angeles 

 County, June 12, 1898. 



304. (614) Iridoprocne bicolor (Vieillot). Tree Swallow. 

 Common in spring and summer in the willow regions of the lowlands. 



The majority migrate south in the fall, but a few remain through the winter. 

 Idle}' become numerous in the spring about the middle of March and breed. 

 ordinarily, from the latter part of April through May. Extreme nesting records 

 are: Four eggs, fresh, taken by II. J. Lelande near El Monte, Los Angeles 

 County. April 15, 1897 (Grinnell. Pub. 2. Pasadena Acad. Sci., 1898, 42). and 

 tour eggs, fresh, taken by Antonin Jay near Santa Monica. July 4, 1903. 



305. (615) Tachycineta thalassina lepida Mearns. Northern Violet- 

 green Swallow. 



Common summer resident ot the Transition zone in the mountains and 



