l62 Genera of Humming Birds. 



Female. — Head and sides of neck shining green, but not so 

 brilliant as in the male. Upperside bronze-green. Underside 

 white. Flanks white, washed with green. Tail bronze, lateral 

 with a brown subterminal bar and tips margined with gray. 



This new species, discovered by Mr. Henry Whitely in 

 British Guiana, is closely allied to U. milleri, but can be 

 distinguished easily from that species, by its black bill. 



Types in Boucard's Museum. 



233- Uranomitra niveipectus, Cab. and Hein., Mus. Heiu., 

 i860, t. iii., p. 33. 



Thaiimatias chionopectus, Gould, Mon. Troch., 1859, p. 5. 



Polytmus chionopectus, Leotard, Ois. Trinid., 1866, p. 140. 



Snoivy-throated Emerald, Gould, Mon. Troch., vol. v., p. 293. 



La Leucolie a poitrine d'lin blanc de neige, Muls., Hist. 

 Nat. Ois. Mou., 1874, t. i., p. 228. 



Habitat. — Trinidad. 



Male. — Head and sides of neck metallic golden-green 

 in some specimens, in others metallic green. Upperside 

 shining coppery-green, more coppery on rump and uppertail- 

 coverts. Tail purplish-bronze, with a wide subterminal 

 purplish-brown bar on lateral feathers. Throat and centre of 

 abdomen pure white. Bar in middle of breast and flanks 

 golden-green. Undertail-coverts greyish with white margins. 

 Wings purplish-brown. Bill black. 



Total length 3|in. Wing, 2, Tail, i|. Culmen, |. 



Female. — Upperside shining bronze green. Uppertail- 

 coverts coppery. Underside white, washed with green on sides 

 of neck, on breast and flanks. Tail beneath bronze passing to 

 brownish-black, with gray tips on lateral feathers. Bill black. 

 Same size as male. 



Rather common in Trinidad. 



Genus LXVII. Cyanomyia, Bon., Rev. and Mag., Zool., 



1854, p- 254- 



Leucolia, Muls., Hist. Nat. Ois. Mou., 1874, t. i., p. 211. 



Type : T. cyanocephala, Lesson. 



Bill straight, acutely pointed, longer than the head, broad 

 at base. Wings long, narrow, nearly reaching the end of tail. 



