Genera of Humming Birds. 149 



■^211. Agyrtria nitidifrons, Gould, P.Z.S., i860, p. 308. 



Thanmatias nitidifrons, Muls., Hist. Nat. Ois. Mou., 1874, 

 t. i., page 238. 



Brilliant fronted Emerald, Gould, Mon. Troch., vol. v., 

 p. 297. 



le Thaumatias a front brillant, Muls., Hist. Nat. Ois. Mou., 

 1874, t. i., p. 239. 



Habitat. — Venezuela (?) 



Adult. — Crown of the head, face, chest, and neck glittering 

 green ; abdomen and flanks golden-green ; back, shoulders, 

 and rump bronzy-green ; tail pale bronzy green, with a zone 

 of purplish-brown crossing the four lateral feathers on each 

 side, near their tips ; undertail-coverts gray with a patch of 

 bronzy-green in the centre of each ; tarsi grayish-brown ; 

 upper mandible black ; under mandible yellow, black at tip. 



Total length, 3|^in. Wing, i^. Culmen, f . " Gould loc cit." 



Gould's type, presented to him by Mr. Lawrence of New 

 York, is still unique, and is now in the collection of the 

 British Museum. 



212. Agyrtria tephrocephala, Vieill., Nouv. Diet. Hist. 

 Nat., t. xxiii., p. 430. 



Ornysfnia tephrocephala, Less. Ois. Mou., 1892, p. 182. 



Ornysmia albiventris, Less. Ois. Mou., 1829, p. 209. 



Polyttnus thaumatias. Gray, Gen. Birds, vol. i., p. 108. 



Thaumatias albiventris, Bon. Consp. Gen. Av., 1850, vol. i., 

 p. 70. 



Coeligena tephrocephala, Reich., Aufz. der Colib., 1853, p. 7. 

 White bellied Emerald, Gould, Mon. Troch., vol. v., p. 301. 



Le Thaumatias a ventre blanc, Muls., Hist. Nat. Ois. Mou., 

 1874, t. i., p. 245. 



Habitat. — Brazil. 



Male. — Upperside dark bronzy-green, deeper in the middle 

 of back. Median rectrices bronze-green, lateral bronze at 

 base, passing into black with gray tips. Throat and breast 

 grass-green. Abdomen and undertail-coverts white. Flanks 



