ORDER MACROCHIRES. 173 
425, Aéronautes melanoleucus (Bairp). 
White-throated Swift. 
Cypselus melanoleucus BatRD, Pr. Ac. Nat. Sci. Phila. June, 1854, 
118. 
Aéronautes melanoleucus HARTERT, Cat. Birds Brit. Mus. XVI, 
1892, 459. 
[B 107, C 269, R 349, C 403.] 
Geroc. Dist.— Western United States, from the Black Hills, 
northern Wyoming, and southern Montana to the Pacific; south, in 
winter, to Guatemala. 
SUBORDER TROCHILI. HummInecsirps. 
FamiILty TROCHILIDZA. Humminceirps. 
GENuS EUGENES Gou.p. 
Eugenes GOULD, Mon. Troch. pt. xii. 1856, pl. 59. Type, Z7o- 
chilus fulgens SWAINS. 
426. Eugenes fulgens (Swains.). 
Rivoli Hummingbird. 
Trochilus fulgens Swans. Phil. Mag. I. 1827, 441. 
Eugenes fulgens GOULD, Mon. Troch. II. 1856, pl. 59. 
[B —, C 274 ds, R 334, C 408.] 
Geoc. Dist.— Southern Arizona and tablelands of Mexico to 
Nicaragua. 
Genus CCGaLIGENA Lesson. 
Celigena Less. Ind. & Synop. Gen. Troch. 1832, p. xviii. Type, 
Ornismya clemencie LESS. 
