ORDER MACROCHIRES. 201 



Chaetura vauxi (J. K. TOWNSEND). Vaux's Swift. [424.] 



Cypcelus vauxi TOWNSEND, Narr. Journ. Rocky Mts., April, 1839, 348. 

 (Columbia River, probably near Fort Vancouver, Washington.) 



RANGE. Breeds from southern British Columbia to Santa Cruz 

 Mountains, California; rare or casual east of the Cascades and the 

 Sierra; migrates through Lower California and Arizona and winters 

 in Central America south to Guatemala. 



SUBFAMILY MICROPODIN^!. TYPICAL SWIFTS. 

 GENUS AERONAUTES HARTERT. 



Aeronautes HARTERT, Cat. Birds Brit. Mus., XVI, 1892, 459. Type, by 

 orig. desig., Cypselus melanoleucus BAIRD. 



Aeronautes melanoleucus (BAIRD). White-throated Swift. [425.] 



Cypselus melanoleucus BAIRD, Proc. Acad. Nat. Sci. Phila., VII, 1854, 

 118. (Camp 123, on Bill Williams River, [west of Ives Peak, Lat. 

 34 15' N.], Arizona.) 



RANGE. Breeds from southern British Columbia and southern 

 Alberta south to Lower California and Guatemala, and from the 

 Pacific coast east to the Black Hills and western Nebraska; winters 

 from southern California southward. 



SUBORDER TROCHILI. HUMMINGBIRDS. 



FAMILY TROGHILIDJE. HUMMINGBIRDS. 



GENUS EUGENES GOULD. 



Eugenes GOULD, Monogr. Trochil., II, 1856, pi. 59. Type, by monotypy, 

 Trochilus fulgens SWAINSON. 



Eugenes fulgens (SWAINSON). Rivoli's Hummingbird. [426.] 



Trochilus fulgens SWAINSON, Philos. Mag., N. S., I, 1827, 441. (Temas- 

 caltepec, Mexico.) 



