ORDER MACROCHIRES. 201 
Chetura vatxi (J. K. TowNseND). Vaux’s Swift. [424.] 
Cypcelus vauxi TownsenD, Narr. Journ. Rocky Mts., April, 1839, 348. 
(Columbia River, probably near Fort Vancouver, Washington.) 
RanGcE.— 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. 
SupFraMity MICROPODINA.. Tyrricau Swirts. 
Genus AERONAUTES Harverr. 
Aéronautes Hartert, Cat. Birds Brit. Mus., XVI, 1892, 459. Type, by 
orig. desig., Cypselus melanoleucus BAIRD. 
Aéronatites melanoleticus (Barrp). White-throated Swift. [425.] 
Cypselus melanoleucus Batrp, Proc. Acad. Nat. Sci. Phila., VII, 1854, 
118. (Camp 123, on Bill Williams River, [west of Ives Peak, Lat. 
34° 15’ N.], Arizona.) 
RancE.— 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. Humminasirps. 
Famity TROCHILIDA. HummMInGpirps. 
GENUS EUGENES Gow .p. 
Eugenes Gouup, Monogr. Trochil., IJ, 1856, pl. 59. Type, by monotypy, 
Trochilus fulgens SWAINSON. 
Etigenes falgens (SwAINSON). Rivoli’s Hummingbird. [426.] 
Trochilus fulgens Swainson, Philos. Mag., N. S., I, 1827, 441. (Temas- 
caltepec, Mexico.) 
