300 AORTII AMERICAN BIRDS. 



grayish, at tip and base, blue-black in 



middle portion ClilorostUbon} 



P. Middle tail-feathers bronzy ; females and younj 

 males without grayish base or tip to outer 



tail-feathers Sporadinus.'' 



A'. Tail less than three-fourths as long as wing, 

 variously shaped, but never forked for more 

 than one-fourth its length ; adult males vari- 

 ously colored, but never entirely green, 

 beneath. 

 0. Lower parts pure white, the sides sometimes 

 green, or ejiotted with green ; sexes 

 alike. 

 /. Exposed culmen decidedlj' more than 

 half as long as tail ; top of head 

 usually metallic blue or violet. 



Uranomitra.' 



f. Exposed culmen not more than half as 



long as tail ; top of head never blue 



or violet Agyrtria} 



P. Lower parts never pure white. 



/. Tail bright bluish green or greenish blue, 

 crossed near end by a broad band of 

 blue-black. 



Breast and sides of head deep blue ; 

 throat brilliant green, the centre 

 of each feather darker; sexes 

 alike ; wing 2.G0-2.80. 



Pctasophora? 

 f. Tail not bluish green, etc. 



A'. Feathering of forehead extended 

 forward as far as anterior end 

 of nostrils, and partly or en- 

 tirely covering the scale over 

 nostrils. 



' Chlnrmtiilhnn GouLD, Mon. Troeli. pt. v. 1853. Typo, Trochilut puchcrani BonRC. & McLS. (Three species 

 in Mexico, one in Porto Rico, and about six in South America.) 



' S'poradinut BoxAP., Rev. ct Ma;». Zool. 1854, 255. Type. Trochilii) riccordi Gerv. (One species in Haiti, 

 one in Cuba and Bahninns, and apparently one peculiar to Bahamas.) 



» Craiiomiiya Rr.icn., Aufz. der Colil). 185.3, 10. Typo, Trochilut frandm Borne. & Mi-LS. (Four species 

 in Mexico, one in Honduras, one in Colombia, and one in Peru.) 



* Ariyrlrta Reich., Troch. Enuni. 1S55, 7. Type, Trochihit hrevirotlrin Less. (Two Mexican and numerous 

 South American species; some of the latter with lower parts mostly greon; one of the former with bulTy or 

 rufous belly and flanks.) 



' Pitaxiphorn Cray, List Gen. B. 1840, 1.1. Type, Trochilut serriroatri) Vieill. (One species in Mexico 

 and Quatcmaln, several in Central and South America.) 



