142 Genera of Hum?ning Birds. 



Young Male. — Chin buff. Abdomen, flanks and undertail- 

 coverts buff-gray, tinged on flanks with golden-green feathers. 

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



A very rare species. 



Genus LXIII. Polyerata, Heine, Journ. fur Orn., 1863, 



p. 194. 



Coeligena and Damophila , Reich., Aufz. der Col., p. 7. 

 Type : P. amabilis, Gould. 



Bill longer than the head, straight, terminating in a sharp 

 point. Nostrils exposed. Tail very slightly forked. Wings 

 long, reaching nearly the end of tail. Feet small. Tarsi 

 clothed. Sexes unlike. 



Habitat. — Costa-Rica, Veragua, Columbia. 



199. Polyerata amabilis, Gould, P.Z.S., 1851, p. 115. 



Julianiya amabilis, Bon., Rev. and Mag. Zool., 1854, p. 53. 



Polyerata amabilis, Heine, Journ. fur Ornith, 1863, p. 194. 



Polyerata decora, Salv., Ann. Mag. Nat. Hist., i89i,p. 394. 



Blue breasted Polyerata. 



La Polyerate aimable, Muls., Hist. Nat. Ois. Mou., 1875, 

 t. ii., p. 53. 



Habitat. — Costa Rica, Columbia. 



Male. — Forehead shining metallic green. Upperside bronze- 

 green. Uppertail-coverts and median rectrices reddish- 

 bronze in some specimens, in others greenish-bronze, lateral 

 rectrices bronze at base, then bluish-black, outermost ones 

 nearly black for all their length. Chin shining greenish-bronze, 

 with black reflections in centre. Throat and upperpart of 

 breast metallic violet-blue in some specimens, in others 

 metallic blue with scarcely any purple reflections. Lower 

 part of breast and flanks greenish-bronze. Abdomen and 

 undertail-coverts gray. A tuft of white feathers on each side 

 of vent. Wings purplish-brown. Maxilla black. Mandible 

 flesh-colour, tip black. 



Total length, 3fin. Wing, 2. Tail, i^. Culmen, |-. 



Female. — Upperside bronze-green, reddish on uppertail- 

 coverts. Median rectrices bronzy-green, with black tips, 

 lateral, bronze at base, then black with grayish tips. Chin 



