1915 BIRDS OF CALIFORNIA 85 
256 (421) Chordeiles acutipennis texensis Lawrence 
Texas NIGHTHAWK 
Synonyms—Chordeiles texensis; Chordeiles virginianus henryi, part; West- 
ern Nighthawk, part. 
Status—Common summer visitant to Lower Sonoran practically wherever 
this zone occurs; particularly numerous on the southeastern deserts and in the 
San Diegan district. Recorded east of the Sierras north to Bishop, in Owens Val- 
ley (A. K. Fisher, N. Amer. Fauna no. 7, 1893, p. 53), and west of the Sierras 
north to Stanislaus County (Belding, Zoe, 1, 1891, p. 99), Paicines, San Benito 
County (J. and J. W. Mailliard, Condor, m, 1901, p. 123) and even to Ukiah, 
Mendocino County (Oberholser, Bull. 86, U. S. Nat. Mus., 1914, p. 104) and 
Winslow, Glenn County (W. P. Taylor, Condor, xtv, 1912, p. 222). Of casual 
occurrence on Santa Barbara Island (Willett, Pac. Coast Avif. no. 7, 1912, p. 58). 
There has been much confusion of this species with Ch. v. hesperis; for in- 
stance the record of terensis from Lake Tahoe (Ray, Osprey, v, 1901, p. 115) 
with very little doubt belongs to hesperis; and conversely many of the records 
of the ‘‘ Western’’ Nighthawk quite surely belong to tevrensis. 
257 (422) Cypseloides niger borealis (Kennerly) 
NorRTHERN BLAcK SwIrt 
Synonyms—Cypseloides niger; Cypseloides borealis; Nephoecetes niger; 
Black Swift; Northern Swift. 
Status—Fairly common summer visitant to a few widely separated locali- 
ties in Upper Sonoran and Transition zones: Vicinity of Owens Lake (A. K. 
Fisher, N. Amer. Fauna no. 7, 1893, p. 54) ; Kearsarge Pass, Inyo County (Mus. 
Vert. Zool.) ; Santa Cruz, where found nesting in the sea-cliffs (Vrooman, Auk, 
xvi, 1901, p. 394; Vrooman, Condor, vir, 1905, p. 176; Dawson, Condor, xvi, 
1915, pp. 8-12, figs. 5-8); Monterey County and San Bernardino Mountains 
(Bendire, Life Hist., 1, 1895, p. 175). Recorded casually or in migration at vari- 
ous other points, localities representing extreme portions of the state being Pitt 
River (Hartert, Cat. Bds. British Mus., xvi, 1892, p. 495), and San Diego (Beld- 
ing, Land Bds. Pae. Dist., 1890, p. 79). In my own experience the black swift 
is a comparatively rare species in this state. 
258 (424) Chaetura vauxi (Townsend) 
Vaux Swirt 
Synonyms—Acanthylis pelasgia; Acanthylis vauxi; Oregon Swift. 
Status—Common summer visitant locally to the northwest humid coast 
Transition, from the Santa Cruz district northward. Recorded as breeding near 
Santa Cruz (Bendire, Life Hist., 1, 1895, p. 183), in Marin County (J. Mail- 
lard, Condor, 1, 1900, p. 64), and in Humboldt County (H. R. Taylor, Condor, 
vir, 1905, p. 177). Occurs commonly in both migrations practically throughout 
the state. 
