308 NORTH AMERICAN BTRDS. 



not very bril 

 liant; wing 

 about 2.50- 

 3.20. 



Coeligena. 

 (Page 310.) 

 l\ Wing less than 2.25. 



Adult males with a brilliant 

 gorget of metallic red 

 or purple... Trochilus. 

 (Page 310.) 

 k^. Feathering of forehead scarcely ex- 

 tended beyond posterior end of 

 nostrils, the scale over latter 

 therefore for the greater part, 

 or entirely, naked, and the bill 

 very broad at base ; wing about 

 1.90-2.15. 

 l^. Tail blue-black in male, deeply 

 emarginated, and with mid- 

 dle feathers tipped with dull 

 grayish ; in female shallowly 

 emarginated, green basally, 

 blue-black terminally, the 

 outer feathers tipped with 

 grayish white; adult males 

 metallic green beneath, the 

 throat bluish. 



lache. (Page 319.) 

 f . Tail not blue-black. 



m\ Exposed culmen more than 

 half as long as tail, 

 n^ Tail rufous, or chest- 

 nut, the feathers 

 usually with dusky 

 or bronzy terminal 

 margins. 



Amazilia. 

 (Page 316.) 

 n^ Tail dull greenish, 

 with dusky sub- 

 terminal band (ex- 

 cept on middle 

 feathers), the outer 

 feathers broadly 



