Genera of Humming Birds. 147 



Thaumatias, Gould, Mon. Troch., Intr., 1861, p. 151. 

 Type : Ao-vrtria leucoofastra Reichenback. 



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

 acutely pointed. Feathers of the forehead not extending 

 upon the culmen. Nostrils exposed. Wings long and narrow. 

 Median rectrices slightly shorter than the next two, these also 

 shorter than the two outermost ones, no subterminal baron 

 the lateral rectrices of the large species, which are generally 

 bronze at base, with the remainder black. A subterminal 

 bar on lateral rectrices of the small species. Tarsi clothed. 

 Sexes alike. 



Habitat. — Guiana, Venezuela, Trinidad and Brazil. 



207. Agyrtria leucogaster, Gmel. Syst. Nat., 1788, vol. i., 



P- 495- 

 Ornysmia albirostris, Less. Ois, Mou., 1829, p. 212 

 Thaumantias leucogaster, Bon., Rev. and Mag., Zool., 1854, 

 P- 255- 



Agyrtria, leucogastra, Reich, Aufz. der Col., 1853, p. 10. 



White-throated Emerald, Gould, Mon. Troch., vol. v., p. 

 294. 



La Leucolie leucogastre, Muls., Hist. Nat. Ois. Mou., 1874, 

 t. i., p. 232. 



Habitat. — Brazil. 



Male. — Head and sides of neck metallic green. Upperside 

 shinino- ofrass-o-reen. Median rectrices bronze-green, lateral 

 steel-black with tips slightly margined with gray. Throat, 

 centre of the abdomen, and undertail-coverts pure white. 

 Breast and sides of fianks shining bronze-green. Wings 

 purple-brown. Maxilla black. Mandible flesh colour with 

 black tip. 



Total length, 3fin. Wing, 2\. Tail, if. Culmen, |. 



208. Agyrtria, viridicauda, Berlepsch, Ibis, 1883, p. 493. 

 Leucippus viridicauda, Berlepsch, Ibis, 1883, p. 493. 

 Berlepsch's White-throat, Gould, Mon. Troch., Suppl., r886, 



P- 73- 



La Leucolie de Berlepsch. 

 Habitat. — Huiro, Peru. 



