318 REPORT OF NATIONAL MUSEUM, 1890. 



I 1 . Wing more than 2.40; adult males without a brilliant 



gorget, or else the latter neither red, purple, nor violet. 

 ?n l . Tail partly rich chestnut, glossed with bright purple; 



bill rather distinctly curved Lampornis.* 



m 2 . Tail without chestnut or bright purple ; bill straight. 

 n l . Tail wholly (male) or partly (female) greenish bronze* 



Eugenes. (P. 319.) 



n 3 . Tail wholly or chiefly black Cmligena. (P. 323.) 



Z a . Wing less than. 2.25; adult males with a brilliant gorget of 



metallic red, purple, or violet. 



m 1 . Middle tail feathers narrower near end than at base. 

 M 1 . Exposed culmen 0.60 or more ; outer tail feathers tip- 

 ped with white only in females. 



1 . Outer tail feather not decidedly shorter than middle 



pair, and not conspicuously narrower than the 

 next; adult males with six innermost quills ab- 

 ruptly much smaller and narrower than the rest. 



TrocMlus. (P. 325.) 



2 . Outer tail feather decidedly shorter than the middle 



pair and abruptly narrower than the next (except 

 in C. lielence) ; adult males with innermost quills 

 normal. 



p l . Tail without any rufous; adult males with tail 

 forked (but feathers not pointed) and top of head 

 brilliantly metallic, like gorget. Calypte. (P. 333.) 

 j> 2 . Tail partly rufous, more or less graduated, in both 

 sexes; adult males with top of head greenish or 

 bronzy, totally unlike gorget (except in S. flo- 



resii) Selasphorus. (P. 339.) 



w 3 . Exposed culmen not more than 0.50 ; outer tail feathers 



tipped with white in both sexes.. ..Atthis. (P. 379.) 



m 2 . Middle tail feathers broader near end than toward base. 



Stellnla. (P. 354.) 



k 2 . Feathering of forehead scarcely extending beyond posterior 

 portion of nostrils, the scale over latter therefore naked for 

 the greater part at least ; bill very broad at base. 



1 1 . Tail blue-black in male, deeply eraargiuated, the middle 



feathers tipped with dull grayish ; in female shallowly 

 emarginate, green basally, blue-black terminally, the 

 outer feathers tipped with grayish white; adult males 

 metallic green beneath, the throat bluish. 



lache. (P. 371.) 



1 2 . Tail not blue-black, etc. 



m 1 . Exposed culmen more than half as long as tail. 

 n l . Tail rufous or chestnut, the feathers usually with dusky 



or bronzy terminal margins Amazilia, (P. 362.) 



M 2 . Tail dull greenish, with dusky subterminal band (ex- 

 cept on middle feathers), the outer feathers tipped 

 with dull, light grayish brown; plumage in gen- 

 eral very dull, *the lower parts dull brownish 



gray . Phawptila^ 



m 3 . Exposed culmeu not more than half as long as tail. 



SasiU-na. (P. 358.) 



* Lampornis SWAINS., Zool. Jour. in. 1827, 358. Type, Trochilus mango LINN. 

 (One Mexican, several West Indian, and several South American species.) 



t Phceoptila GOULD, Intr. Mon. Troch. Oct. ed., 1861, 169. Type, Cyanomyia (?) sor- 

 dicla GOULD. (The single known species peculiar to Mexico.) 



