Genera of Humming Birds. 399 



Amaziliidae. 



POLYERATA DECORA, Salv., Cat. of Birds, vol. xxi., p. 238. 



Damophila amabilis, Salv., P.Z.S., 1870, p. 211. 



Polyerata amabilis, Boucard, Gen. H.B., p. 142. 



Veraguan Polyerata. 



la Polyerate de Veragita. 



Habitat. — Chiriqui, Veragua. 



Male. — Very closely alike that of P. amabilis, but the bill 

 much longer and the glittering feather of the crown extended 

 to the nape. 



After a careful study of my specimen, collected in Chiriqui 

 by Mr. Arce, I have come to the same conclusion as Mr. 

 Salvin, that it is a valid species. 



Polyerata rosenbergi, n.sp. 



Rosenberg's Polyerata. 



la Polyerate de Rosenberg. 



Habitat. — Rio Dagua, Colombia. 



Male. — Upperparts dark bronze-green. Median rectrices 

 bronze-green, laterals bronze-green at base, then bluish-black, 

 outermost one bluish-black. Chin and throat metallic emerald- 

 green. Breast metallic blue with a purplish tinge. Abdomen 

 dark sooty gray with a bar of metallic green feathers, separa- 

 ting the blue of the breast from the gray of the abdomen. 

 Undertail-coverts pure white. Maxilla black. Mandible flesh 

 colour with black tip. 



Total length, 3^^^. Wing, 2\. Tail, \\. Culmen, ^. 



Female. (^) — Upperside coloured as the male ; but all the 

 rectrices, excepting the middle ones, are tipped with white. 

 Underside white, speckled with metallic green feathers on the 

 breast and abdomen. Undertail-coverts white. Maxilla and 

 mandible black. Same size as the male. 



This fine new species, which cannot be confused with 

 P. ambilis or P. decora, having no metallic forehead, and 

 being much more brilliantly decorated on the underside than 

 any of the other two species, was discovered this year in 

 Colombia by Mr. H. W. Rosenberg, to whom I have the 

 pleasure of dedicating it. 



