308 NORTH AMERICAN BIRDS. 



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.) 



A*. 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. 



Z 1 . 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.) 

 P. Tail not blue-black. 



m l . Exposed culmen more than 



half as long as tail. 

 n 1 . Tail rufous, or chest- 

 nut, the feathers 

 usually with dusky 

 or bronzy terminal 

 margins. 



Amazilia. 

 (Page 316.) 



n f . Tail dull greenish, 

 with dusky Bub- 

 terminal band (ex- 

 cept on middle 

 feathers), the outer 

 feathers broadly 



