24 Genera of Humming Birds, 



Male. — Upperside pale golden-green. Throat metallic crimson 

 with blue reflections on the sides. Breast and abdomen white. 

 Flanks and undertail-coverts white-washed with pale golden- 

 green. Tail black on outer web, white nearly to the tip on 

 inner, tip black. Bill black. 



Total length, 5| in. Wing, If. Tail 3|. Culmen, i. 



Femalfi. — Upperside pale golden-green. Throat white, 

 speckled with pale green. Breast, abdomen, and under tail- 

 coverts white. Flanks white-washed with pale green. Middle 

 tail feathers green on inner web, white on outer with black tip, 

 lateral white with a broad subterminal black band. Bill black. 



Total length, 3i in. Wing, If. Tail, 1^. Culmen, ^. 



Dedicated by Lesson to Cora, Priestess of the Sun. I have 

 several specimens of this fine species collected by Mr. Whitely 

 in Peru. Two come from Ex Collection, Costa de Beauregard. 



Genus XV. Heliactin, Boie Isis, 1831, p. 546. 



Heliactinia, Reich, Aufz der Colib. 1853, p. 12. 



Heliactinus, Burm, Th. Bras. 1854-56, t. ii., p. 356. 



Type T. cornuta., Pr. Max. 



Bill longer than the head, slender terminating in a sharp 

 point. On either side of head a tuft of feathers forming a 

 short elevated crest. Wings long pointed. Four medium 

 rectrices longest, broad at base, and graduating to a point. 

 Tarsi bare. ISexes unlike. 



Habitat. — Brazil. 



36. Heliactin cornuta, Pr. Max, Beit zur Naturg von Braz, 



p. 99. 



Trochilus dilophus, Vieill, Ency. Meth., vol. ii., p. 573. 

 Trochilus bilophus, Temm, Plan Colo, p. 18. 

 Mellisuga cornuta, Gray, Gen. of Birds, vol. i., p. 113. 

 Mellisuga bilopha, Steph, Gen. Zool., vol. xiv., p. 251. 

 Ornysmia chrysolopha, Less. Ois. Mouch, 1829, p. 55. 

 Heliactina chrysolopha, Reich, Aufz der Colib. 1853, p. 12. 

 Heliactinus cornutus, Burm, Th. Braz., vol. ii., p. 356. 

 Sun Gem, Gould, Mon. Troch. vol. iv p. 212. 

 V Heliactin aux huppes cVor, Muls. Hist. Nat. des Ois. m. t. 

 iv., p. 5. 



Habitat, — Brazil. 



