THE HUMMING IJIUDS. 373 



nitida would eventually prove to be merely a variiition of 7. doiibledayi, 

 and not a distinct species. 



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

 females of all except /. latirosfris and L nitida being unknown to me: 



a'. Tail forked for ouly one-fourtli its total length ; exposed culmeu more than .70. 

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

 c'. Under tail coverts white, with dull gra.\ ish central spaces, entirely white in 

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

 north to southern Arizona. 



/. latirostris (Swains.). Circe Humming Bird (Page 373). 

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

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

 Marias Islands, western Mexico. 



/. lawrencei Berl. Lawrence's Hummin<j Bird * 

 ¥-. Upper p.arts purplish copper-bronze ; bill smaller and narrower (exposed culmen 

 less than 0.76, width at base not over 0.12). Huh., Western Mexico (vicinity 

 of Mazatlan). /. magica (MuLS. and Vei!I?.). Ma(jic Hnmmiiif/ BirdJ 



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

 than 0.70. 

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

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

 Arroycs, Guerrero; " Chimautla"). 



I. donhledatji (BouRc). Douhleday's Humming Bird.t 

 ■ ¥. Under parts metallic blue, the throat more purplish blue; top of head metallic 

 blue, more greenish posteriorly. Hah., Southwestern Mexico (Sierra Madro 

 of Guerrero; Chihuitan, Tehuantepec). 



/. 7iitidu Salv. Shining Humming Bird.^ 



CiRCE Humming Bird. lachc latirostris (S\vain.s.). 



(Plate XLV.) 



Cynantkns latirostris ^WWT:;?,., Philas. Mag.,i, 1827, 441. 



Circe latirostris GouLD, Mon. Troch., pt. xiii, 1W57, pi. 7; vol. v, 1861, pi. 338.— 

 Hensh., Am. Sportsm., V, Feb. 20, 187.'), 328 (Chiricalina Mountains, Arizona); 

 Zoo I. Wheeler's Exp., 1875, 360. 

 lachc latirostris Elliot, Class, and Syuop. Troch., 1H71), 23.^). 

 Circe (Gould). 

 Broad-billed Humming Bird. 

 La Circe a large bee (Mulsant and Verreaux). 

 Chupamirto matraquita (D'Oca). 



Range. — 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, Avith or with- 

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



* lache lawrencei Berl., Ridgw., Man. N. Am. B., 1887, 320. 



t Hijlocharis magica Mul.s. and Vkrr., Ann. Soc. Lyon, xviii, 1872, \10. —htchc magica 

 Elliot, Class, and Synop., Troch., 18711, 2:{r>. 



\Trochilus donhlcdayi BouRC, P. G. S., 1874, M\.— lache dunhhdaiji Elliot, Class, 

 •and Synop. Troch., 18711, 23.">. 



^ lache nitida Salv., litis, April, 1H8;), 240. 



