340 Genera of Humming Birds. 



Male. — From British Guiana. Upperside shining golden- 

 green, excepting the head, which is greenish-blue with the 

 centre of crown golden-bronze. White spot on neck. Median 

 rectrices white at base, then greenish-bronze with bluish-black 

 tips, rest white with a bluish-black spot at tip, narrowly- 

 margined with white. Throat dark blue with greenish re- 

 flections. Flanks golden-green, rest of underside pure white. 



I propose the name of F. guianensis for this species, if it 

 should prove distinct. I have three specimens, one from 

 Demerara and two from River Atapuroni, B. Guiana, collected 

 by H. Whitely. 



Male. — From Ecuador and Pebas, Peru. Head, throat, 

 and upperpart of breast dark greenish-blue, passing to shining 

 green close to the white spot of neek. Rest of upperside 

 shining green with golden reflections. Median rectrices white 

 at base passing to bluish black, the next one white with bluish- 

 black tip, the last three white with a very minute brown spot 

 on tip of the one next to outermost one, this last one, pure 

 white. Wings purplish-brown. Bill black. 



Total length, 4fin. Wing, 2-|. Tail, i|. Culmen, -J. 



Female. — Upperside bright golden-green, brownish on 

 head. Uppertail-coverts shining green. Median rectrices 

 and the three next ones bronze-green with bluish- black tips, 

 and slightly margined with white, outermost ones bronze-green 

 at base with broad subterminal bluish-black bar, margined on 

 outer web with broad white tips. Chin and abdomen pure 

 white, throat and upper part of breast pure white, margined 

 with black. Side of neck, lower part of breast and flanks 

 white, washed with golden-green. Under-tail-coverts gray at 

 base, then dark bluish-black margined with white. Wings 

 purplish-brown. Bill black. 



Total length, 4fin. Wing, 2f . Tail, if. Culmen, \. 



I propose the name of F. pertiviana for this species, if it 

 should prove distinct. I have four specimens of this species, 

 one collected by Buckley in Ecuador, two collected by 

 Garlepp in Ecuador, and one by Hauxwell, at Pebas, Peru, in 

 1866. I have also one specimen exactly like the preceding 

 with the bill one inch long. I believe that it is what Gould 

 described as F. flabellifera. 



