58 PACIFIC COAST AVIFAUNA No. 7 



The type specimen of the egg of this species ( no. 25937 coll. l\ S. Nat. 

 Mnseuni) is one of a set of two egg's taken near Monrovia, Los Angeles 

 County, May 4, 1893, and presented to the National Museum by R. H. Law- 

 rence (Bendire, Life Hist. N. Am. Bds., 1895, 159). F. M. Palmer took two 

 slightly incubated eggs near Eagle Rock, Los Angeles County, June 24, 1900 

 (Condor ii, 1900, 130), and Antonin Jay took two eggs, incubation commenced, 

 near Monrovia, June 29, 1902. L. H. Miller has taken eggs in the Temescal 

 Mountains, near Riverside, and A. M. Ingersoll took a set of two eggs ad- 

 vanced in incubation, near San Diego, March 22, 1895 ( Barlow, Nidiologist ii, 

 1895, 126). The poor-wills occuring in the southern part of San Diego County 

 and the northern part of Lower California are intermediate toward the form 

 Phalaenoptilus mittalli uifidtis Brewster (Bishop, C(Midor vii, 1905, 142; An- 

 thony. Auk XII, 1895, 139). 



196. (420d) Chordeiles virginianus hesperis Grinnell. Pacific Night- 

 hawk. 



Summer resident of the Boreal and upper part of the Transition zone in 

 the San Bernardino Mountains. Occasional visitant to the valleys during mi- 

 grations. June 18, 1905, J. Grinnell took two fresh eggs of this bird, on the 

 north side of San Gorgonio Peak, San Bernardino Mountains, at an altitude 

 of about 9000 feet (Univ. Calif. Publ. Zool. v, 1908, 67). Mr. Grinnell also 

 took a male bird at Pasadena, October 27, 1896 ( Pub. 2, Pasadena Acad Sci., 

 1898, 26). 



197. (421) Chordeiles acutipennis texensis Lawrence. Texas Night- 

 hawk. 



Common summer resident of the mesas and dry washes, in late summer 

 wandering up into the Transition zone in the mountains. Leaves for the south 

 in August and early September, and returns mostly during the month of March. 

 Eggs are generally deposited during May and early June. J. Grinnell took 

 two fresh eggs near Pasadena, April 21. 1897, and H. S. Swarth took two 

 slightly incubated eggs in the San Fernando Valley, Los Angeles County, July 

 11, 1895 (Grinnell, Pub. 2, Pasadena Acad. Sci., 1898, 27). I took an adult 

 female on Santa Barbara Island, June 20, 1911. Dissection showed that she 

 was breeding. 



198. (422) Cypseloides niger borealis (Kennerly). Black Swift. 

 Occurs in southern California irregularly in the summer. Probably mostly 



migratory, but may occasionally breed. J. G. Cooper noted one bird at Santa 

 Barbara in May, 1863 (.Bryant, Zoe ii, 1891, 128). H. S. Swarth saw a flock 

 of at least two hundred birds flying over Sierra Madre, Los Angeles County, 

 on the evening of May 27, 1898, and noted several birds in the San Fernando 

 Valley, Los Angeles County, May 30, following. He also saw a bird near Los 

 Angeles, June 29, 1900. Flocks were observed by J. Grinnell at Pasadena on 

 two occasions toward the last of August. They were flying in a southeaster- 

 ly direction (Pub. 2, Pasadena Acad. Sci.. 1898, 27). Mr. Grinnell also saw 

 two birds at an altitude of about 7000 feet in the San Bernardino Mountains, 



