176 Genera of Humming Birds. 



Habitat. — Guiana and Venezuela. 



Male. — Upperside bronze-green. Underside shining grass- 

 green in some, and metallic golden-green in others. Tail 

 and undertail-coverts metallic grass-green. Maxilla black. 

 Mandible flesh colour at base, the rest black. Wings purplish- 

 black. 



Total length, 3|in. Wing, 2%. Tail, if. Culmen, |. 



Female. — Upperside bronzy-green. Underside golden- 

 green washed with whitish gray. Lateral feathers of tail 

 tipped white. Undertail-coverts shining green edged with 

 wdiite. Rest of plumage like that of male. 



252. Polytmus leiicorrhoiis, Sclat.and Salv.,P.Z.S., 1867, p. 5S4. 

 Polytmits leucoproctus, Gray, Handl. Birds, p. 128. 



ChroysobroncJius leucorhous, Sclat and Salv., Nomenclator, 

 p. 89. 



White-vented Golden-throat, Gould, Mon. Troch., Suppl., 

 p. 86. 



Le Chrysobronche a sous caudales blanches, Muls., Hist. Nat. 

 Ois. Mou., 1874, t. i., p. 281. 



Habitat. — Rio Negro (Brazil) and Peru. 



Male. — Exactly like the preceding species from which it 

 differs only by the forehead, which is brown, and the undertail- 

 coverts pure white. 



Female. — Differs by the outertail feathers tipped white. 

 This rare species was discovered by the celebrated Naturalist, 

 Mr. A. Wallace. 



Genus LXXVI. Doleromyia, Bon., Rev. and Mag. Zool., 



1854, p. 249. 



Dolerisca,C-ab. and Hein., Mus. Hein., i860, t. iii., p. 6. 



Type : T. fall ax, Bourcier. 



Bill longer than the head, straight, broad, and flat at base. 

 Wings long, primaries rather broad, the first slightly pointed. 

 Tail even, feathers broad and very slightly pointed. Feet 

 large, tarsi partly feathered. Sexes alike. 



Habitat. — Venezuela. 



