THE HUMMING BIRDS. 373 



nitida would eventually prove to be merely a variation of 1. doubledayi, 

 and not a distinct species. 



The males of the several forms may be distinguished as follows, the 

 females of all except /, latirostris and I. nitida being unknown to me: 



a 1 . Tail forked for only one-fourth its total length ; exposed cuhneu more than .70. 



1 1 . Upper parts bronze -green ; bill larger and broader at base. 



c 1 . Under tail coverts white, with dull grayish central spaces, entirely white in 

 young; whole throat metallic blue. Hal., Western and central Mexico, 

 north to southern Ari/ona. 



/. latirostris (SWAINS.). Circe Humming Bird (Pago 373). 



c 2 . Under tail-coverts dusky grayish, glossed with green, margined with grayish 

 white ; throat metallic green, tinged with blue toward chin. Hal. Tres 

 Marias Islands, western Mexico. 



/. laicrcncei BERL. Lawrence's Humming Bird* 



1 2 . Upper parts purplish copper-bronze ; bill smaller and narrower (exposed culmen 



less than 0.75, width at base not, over 0.12). Hal., Western Mexico (vicinity 

 of Mazatlan). f. magica (Muis. and VKRR.). Magic Humming Bird.\ 



a 2 . Tail forked for much more than one-fourth its total length; exposed culmen less 

 than 0.70. 



1 1 . Under parts, except throat, metallic bluish green; top of head metallic emerald- 



green, inclining to blue on forehead. Hal., Southwestern Mexico (Dos 

 Arroyos, Guerrero: "ChimautJa"). 



/. douhledaui (Bounc.). Doulleclay's Humming Bird.\ 



1 2 . Under parts metallic blue, the throat more purplish blue; top of head metallic 



blue, more greenish posteriorly. Hal., Southwestern Mexico (Sierra Mad re 

 of Guerrero; Chihuitan, Tehuantepec). 



/. nitida SALV. Shining Humming Jttrd.fy 



* 

 CIRCE HUMMING BIRD. ^lache latirostris ( SWAINS.). 



( Plate XLV.) 



Cynanthus lalirosiris SWAINS., Philos. Mag.,i, 1827, 441. 



Circe latirostris GOULD, Mon. Troch., pt. xm, 1857, pi. 7; vol. v, 1861, pi. 338. 

 UENSII., Am. Sportsm., v, Feb. 20, 1875, 328 (Chiricahua Mountains, Arizona); 

 Zoo' I. Wheeler's Exp., 1875, 380. 



Incite latirostris ELLIOT, Class, and Syuop. Troch., 1879, 235. 

 Circe (GOULD). 

 Broad-billed Humming Bird. 

 La Circe 11 large bee (MULSANT and VERREAUX). 

 Chnpamirto matraquita (D'OCA). 



KANGE. Western and central Mexico, north into southern Arizona. 



SP. CHAR. Adult male, metallic bronze-green above, much duller on 

 top of head, and on upper tail-coverts ; tail blue-black, the middle feathers 

 tipped with brownish gray ; chin and throat bright metallic blue, rest 

 of under parts metallic green, the under tail-coverts white, with or with- 

 out grayish or greenish central spots; bill reddish basally (brownish in 



* lacltc lawreneei BERL., RiDGW.,Mau. N. Am. B., 1887, 320. 



t Hylocharis magica MULS. and VERB., Ann. Soc. Lyon, xvm, 1872, 110. Indie wayica 

 ELLIOT, Class, and Synop., Troch., 1879, 23f>. 



t Trochilns doulledayi BOURC., P. G. S., 1874, 4<J. lache doubh'dayi ELLIOT, Class. 

 and Synop. Troch., 1879, 23,"). 



$ lache nitida SALV., Ibis, April, !*!>, 240. 



