Genera of Humming Birds. 313 



Type of Vieillot ''Ex. Coll. Riocour" in my Collection. 



My specimens from Colombia and Ecuador are very distinct 

 in their colouration. 



The male has the forehead luminous green, exactly of the 

 same colour as the line from the gape to the ear. The neck, 

 rump and undertail-coverts are shining green, golden in 

 certain lights. The back and upperwing-coverts golden- 

 green, luminous in certain lights. The remainder of plumage 

 is like H . auritus. The female is also more golden on upper- 

 side, and the throat more spotted than the specimens of 

 Brazil and Guiana. If it should prove a distinct species, I 

 propose the name of Heliothrix columbianus for it. 



Total length of male, 4Mn. Wing, 2\. Tail, i|-. Culmen,|-. 



Female. — Total length, 5:^in. Wing, 2\. Tail, 2|-. 

 Culmen, ^. 



The young male has the head rufous and no violet-blue ear. 



428. Heliothrix auriculatus, Licht.,Nordm. Erman. Reise, 



1^35. P- 5- 



Ornismya poucheti, Less, Rev. Zool., 1840, p. 72. 



Heliothrix aurita, Burm., Th. Bras., vol. ii., p. 336. 



Heliothrix phainolaema , Gould, P.Z.S., 1855, p. 87. 



Brazilian Fairy, Gould, Mon. Troch., vol. iv., p. 214. 



Green-throated Fairy , Gould, Mon. Troch., vol. iv., p. 215. 



r Heliothrix de Pouchet, Muls., Hist. Nat. Ois. Mou., 1876, 

 t. ii., p. 340. 



Habitat. — Brazil. 



Male. — Head, chin, and sides of neck luminous golden- 

 green. Upperside golden-green, shining brilliantly on neck. 

 Four median rectrices bluish-black, remainder pure white. 

 Lores and line behind the eye black, ending in metallic violet- 

 blue. Underside white. Wings purplish-black. Maxilla 

 black. Mandible flesh-colour at base, rest black. 



Total length, 5in. Wing, 2|. Tail, 2|. Culmen, f. 



Female. — Like H . auritus^ but more spotted on throat in 

 my specimens. 



I have two specimens, collected in Ecuador, by Buckley, 

 which differs in the colouration and are smaller. The head, 



