312 Genera of Humming Birds. 



In the female, the outermost rectrices are about half the length 

 of the medians, the lateral next to the two medians of the 

 same length as the latter. Uppertail-coverts very long in the 

 male, it reaches two thirds of the length of tail. Tarsi clothed 

 to the toes. Sexes similar in colour. 



Habitat. — Central America, Colombia, Ecuador, Peru, 

 Venezuela, Guiana, and Brazil. 



427. Heliothrix AURITUS, Gmel., Syst. Nat., 1788, vol. i., 



P- 493- 

 Trochilus auritus, Vieill., Nouv. Diet. Hist. Nat., 18 17, t. 

 vii., p. 368. 



Oiseau Mouche à oreilles, Vieill., Nouv. Diet. Hist. Nat., 

 18 1 7, t. vil., p. 368. 



Trochilus lencocrotophus, Vieill., Nouv. Diet. Hist. Nat., 

 1817, t. vii., p. 374. 



Ornismya aurita, Less., Ois. Mou., 1829, t. x.-xi., p. 63. 



Heliothrix nigrotis, Gray, Gen. Birds, vol. i., p. 115. 



Heliothrix longirostris, Gould, P.Z.S., 1862, p. 124. 



Cayenne Fairy, Gould, Mon. Troch., vol. iv., p. 213. 



r Heliothrix à oreilles, Muls., Hist. Nat. Ois. Mou., 1876, 

 t. ii., p. 238. 



Habitat. — Brazil, Guiana, Venezuela, Colombia, Ecuador 

 and Peru. 



Male. — Head shining metallic green. Upperside dark 

 shining green with a golden tinge on back. Uppertail-coverts 

 shining green. Four middle rectrices bluish-black, remainder 

 pure white. Lores and a line below the eye black, ending in 

 metallic voilet-blue. Below this line, is another extending 

 from the gape which is luminous green. Entire underside 

 pure white. Wings purplish black. Maxilla black. Mandible 

 flesh colour at base, rest black. 



Total length, 4^in. Wing 2f. Tail, 2\. Culmen, f. 



Female. — Upperside shining green with a bronze tinge on 

 back. On the lateral rectrices there is an oblique bluish-black 

 bar near the base. Line from gape passing under the eye 

 bluish-black. Underside all white with pale brown spots on 

 throat, rest like the male. 



Total length, S-Jin. Wing, 3J. Tail, 3. Culmen, f. 



