1912 BIRDS OF SOUTHERN CALIFORNIA 59 



July 16, 1906. and in the first part of July, 1907, he noted three birds in the 

 same vicinity ( Univ. Calif. Publ. Zool. v, 1908, 69). 



F. Stephens informed Major Bendire that this species had been taken by 

 R. B. Herron in the San Bernardino Mountains, where they appeared to be 

 breeding-. They were flying in behind a water fall that poured over a perpen- 

 dicular cliff and one was found drowned in the basin at the foot of the pool 

 (Life Hist. X. Am. Bds., 1895, 176). L. H. Miller saw three birds at about 

 5500 feet altitude in the San Bernardino Mountains, the first week in August. 

 1907. One of the birds flew into a niche in a cliff and remained there several 

 minutes. Antonin Jay and myself saw a flock of eight or ten birds of this 

 species at San Jacinto Lake, Riverside Count)-, on the evening of May 28, 

 1911 (Condor xni, 1911, 160). L. Belding saw a flock of twenty or more Black 

 Swifts flying over the mesa near San Diego on the evening of May 21, 1881. 

 They were noted again the following evening and a specimen secured (Land 

 Bds. Pac. Dist.. 1890, 79). 



199. (424) Chaetura vauxi ( J. K. Townsend ). Vaux Swift. 

 Common spring and fall migrant in scattered flocks, sometimes tarrying 



in large companies around lakes or swamp lands. Noted by J. G. Cooper at 

 Ventura, April 22, 1873 (Auk iv, 1887, 92), and by J. Mailliard at Santa Cruz 

 Island in late April, 1898 (Bull. Cooper Orn. Club 1, 1899, 44). T have fre- 

 quently observed it at Los Angeles in migrations, some times in company with 

 the next species. In the latter part of April, 1904, I saw a flock of forty or 

 fifty birds mingling with eave swallows that were nest building on a barn 

 near Compton, Los Angeles County. H. S. Swarth has observed the species 

 near Los Angeles in the spring from April 19 (1898) to May 18 (1899), and 

 in the fall from August 4 to October 14 ( 1899). H. Robertson took two speci- 

 mens at Los Angeles, April 25, 1900. L. Belding took two specimens from a 

 small flock near San Diego, April 28, 1884. He also noted them in the same 

 locality. April 16. 26 and 29, 1885 (Land Bds. Pac. Dist.. 1890, 79). 



200. (425) Aeronautes melanoleucus (Baird). White-throated Swift. 

 Common resident of the mountainous and rugged hill regions, occasional 



on some of the Santa Barbara Islands. Common in winter in straggling flocks 

 in the lower country. Breeds plentifully in May and June in almost inac- 

 cessible cliffs. So difficult are the nests to reach that few eggs have been 

 taken. L. Peyton took four slightly incubated eggs near Sespe, Ventura County, 

 May 29, 1910. H. G. Rising took two fresh' eggs in the Santa Monica Moun- 

 tains. June 16, 1897, and E. Simmons took two eggs, one-third incubated, near 

 Pasadena, May 30, the same year ( Grinnell, Pub. 2, Pasadena Acad. Sci., 

 1898, 27). W. C. Hanna took four slightly incubated eggs near Colton. May 

 28, 1908 (Condor xi, 1909, 77). Florence Merriam Bailey saw four pairs of 

 birds feeding young in crevices in the old mission at San Juan Capistrano, 

 San Diego County, about the middle of July, 1907 (Condor ix, 1907, 169). 



201. (429) Archilochus alexandri ( Bourcier & Mulsant). Black-chin- 

 ned Hummingbird. 



J. Grinnell says of this species : "It is a common summer resident from the 



