THE HUMMING BIRDS. 317 



/^ Exposed culmeu less than half as long as wing. 



gK Tail 2.'25 or more, rounded, feathers very broad the three outermost 

 broadly tipped with white in both sexes; shaftsof three outer quills 



very strong, often euormoiisly thickened CamiyyJopterusA 



^2. Tail less than 2.25. 



ft,'. Tail more than three-fourths as long as wing; forked for more 

 than one-fourth its length, the feathers broad and rouuded at 

 tips ; adult males wholly bright green beneath, the tail blue- 

 black or bronze-black, 

 i'. Middle tail-feathers blue-black, like the rest (tipped with dull 

 grayish in the Mexican species) ; females and young males 

 with outer tail-feathers grayish white or pale grayish at tip 



and base, blue-black iu middle portion ChlorostUbon.t 



i'. Middle tail-feathers bronzy; females and young 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 



never entirely gi'een beneath. 



i'. Lower parts white, the sides sometimes green or spotted with 



green ; sexes alike. 



f. Exposed culmen decidedly more than half as long as tail ; top of 



head usually metallic blue or violet Ura)iomi1ra.\\ 



p. Exposed culmen not more than half as long as tail ; top of head 



never blue or violet Agijrlria.*\ 



i*. Lower parts never pure white. 

 jK Tail bright bluish green or greenish blue, crossed near end by 



a broad band of blue-black Petasophora.** 



j'^. Tail not bright bluish green, etc. 



kK Feathering of forehead extended forward as far as anterior 

 end of nostrils and partly or entirely covering the scale over 

 the nostrils. 



* Doricha Reich., Aufz. der Colib. 18.53, 12. Type, Trochilus fJttCMrMS Vieill. (One 

 Mexican, one Guatemalan, one Costa Rican, and two Bahaman species.) 



\ Campyloptenis SwAi>fs., Zool. Jour. 1826, 328. Type, Trochilus largipeunis Bodd. 

 (One Mexican species — a splendid bird -one peculiar to Guatemala, and several in 

 northern South America. The tirst, C. hemileiicurus (Light.), is the largest humming 

 bird found north of the Isthmus of Panama, being nearly 6 inches in length. It is 

 very possibly the species to which Dr. R. W. Shufeldt, U. S. A. , refers in a letter dated 

 June 9, 1386, as having beeu seen by him the day before, near Fort Wingate, New 

 Mexico, and which he described as being " fully large enough for Eugenes fulg en 8, and 

 whirred like an old quail.") 



t Chlorostilbon Gould, Mon. Troch, pt. v, 1853. Type, Trochilus pmcheratii Boukc. 

 and MuLS. (Three species in Mexico, one in Porto Rico, and about six in South 

 America.) 



^ Spo7-aditms Bonap., Rev. et Mag. Zool. 1854, 2.55. Type, Trochilus riccordi Gerv. 

 (One species in Haiti, one in Cuba and Bahamas, and apparently one peculiar to Ba- 

 hamas.) 



II Uranomitra Reich., Aufz. der Colib. 1853, 10. Type, Trochilus franc'uv BouRC. and 

 MuLS. (Four species in Mexico, oue in Honduras, one in Colombia, and one in Pern.) 



If ^(7i/}-<ria Reich., Troch. Enum. 1855,7. Type, Trochilus brevirostris hKSS. (Two 

 Mexican and numerous South American species ; some of the latter with lower parts 

 mostly green ; oue of the former, with buffy or rufous belly and Hanks.) 



"* Petasophora Gray, hist Gen. B. 1840,13. Type, Trochilus serrirostris Vieill. 

 (One species in Mexico and Guatemala, several iu Central and South America.) 



^ 



