FAMILY TROCHILID.E 



e. Under parts pure white; top of head bright 

 metallic royal purple .... Heliothryx barroti 



ee. Head, neck and chest metallic blue; a white 

 band across .hindneck; abdomen dull 

 white Florisuga mellivora 



dd. Tail bronze like rump and lower back; head, 

 throat and chest metallic emerald green .... 

 Saucer ottia edward 



cc. Under parts without extensive and conspicuous 

 white areas. 



d. Chin, throat, chest, middle of breast and abdo- 

 men velvety black; tail extensively metallic 

 purplish A nthracothorax n. nigricollis 



dd. With no black on under parts. 



e. Rather large length about 118 mm. (4.60 in.) 

 or over; under parts metallic green; tail 

 broad and rounded. 



f. Under parts metallic emerald green; tail 



bronzy bluish black 



Chalybura buffoni micans 



ff. Under parts dull grayish bronzy green; tail 

 dull silvery green. . . Phaochroa c. cuvieri 



ee. Smaller, length 112 mm. (4.40 in.), or under; 

 under parts with bright or brilliant metallic 

 coloring. 



f. Under parts with bright metallic violet 

 blue or bluish purple. 



g. Larger; crown, upper back and abdomen 



bright metallic bluish purple 



Thalurania c. columbica 



gg. Smaller; with no metallic bluish purple 

 in upper parts. 



h. Breast and abdomen bright metallic 

 violet blue; throat brilliant emerald 

 green Damophila panamensis 



hh. Chest bright metallic violet blue. 



i. Tail golden bronze, not forked. . . . 

 Hylocharis elicice. 



ii. Tail dark colored, forked. 



j. Crown brilliant metallic emerald 

 green (from front) ; chin and 



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