448 NOUTll AMEIUCAX UIRDS, 



inucli smaller, more linear, and nearly eijiial in width (aluint that of inner 

 wel) of the foiirliij, so lliat liie interval lietween tlio liflli and fourth in from 

 two to live times as great as that between llie til'tli and sixth. The inner 

 welt of these nulucod jiriinariea is also eniarginated at the end. This ciiar- 

 aeter is even sometimes seen in the females, l)Ut to a less extent, and may 

 servo to distinguish hotli rdlnhrU and aUxaiuIri, from other allied species 

 where other marks are obscured. 



The following diagnosis will serve to distinguish the species found in the 

 Tnited States : — 



Common ('maiiactkus. Aliovc iind on the .'^idos inotnllin grpcii. A rnfT of 

 liu'tiillic rcallu'is lidiii till' liili lo the hrt'iist, bcliind wliicli is ii wliitisli <'()liiir, 

 conlliicut with a iiiurow ali(loiiiiiiiil strl[)(.'; ii white spot liciiind tiio I'vc Tail- 

 fcatliois witliout li^'lit iiiai^riiis. 



Tail dci'ply IoiUimI (.;ii) of an ini'li). Throat brijrhl coppory-red IVoin the 

 chill. Tail of li'inalo roiiiiijrd, uiiiarijinatc'd ..... T. cohihriK. 



Lai'KiT. Tail slijjhtly loikcil (.10 of an inch). Throat goiyct with violet, 

 steel, ffrcon, or bine reileetions behind; aiitoriorly opatpie velvety-blaek. 

 Tail of f'emnlo graduated ; .scarcely eiiiarginated .... T. (tle.miidn'. 



Trochilus colubris, T.ixn;kus. 



BUBY-THBOATED HUHHINO-BIBD. 



Troeliilu.1 enhih'iK, LiNV. Syst. Nat. I, 17(if>, 1!U. — Wilson, Am. Oni. II, 1810, 20, pi. 

 X. — Aim. Oni. niog. I, 1832, 248, jil. .\lvii. — lii. Itiid.s Am. IV, 1842, I'JO, pi. 

 (•diii. — Baiiii), Itirds X. Am. IS.'iS, 131. — Max. C'al>. .1. VI, iri4. — Sa.mukls, 111. 

 — Al.i.KN, H. Kill. 301. Ornixi/niii. co/itlirin, l)i;vii.i,i:, Ui'v. vt Jlag. Zool. May, 1852 

 (liabitsV Trin'hihis imri'lijustr); liAWKKNCK (idi.'iiliolic spccimon.s). 



Sr. CiiAii. Tail in the male ileejily Ibrked ; the fi'athers all narrow laneeolate-acnto. 

 In the female slightly rounded and emarginate; the reatlier.s broader, though pointed. 

 Male, uiiiforin inetallie greiMi above; a riiby-red gorget (lilaekish near the bill), with no 

 conspieuons riill'; a white collar on the jiignluin ; sides of liody greenish; tail-feathers 

 Uliil'oriiily browni.sli-violet. Female, without the red on the throat; the tail roiniileil 

 and eiiiarginate, the inner feathers .shorter than the outer; the tail-feathers banded with 

 black, and the outer lipped with white; no rufons or einnaiiion on the tail in either se.x. 

 Length, 3.25 ; wing, 1.00; tail, 1.20; bill, .(If). Yming males are like the females; the 

 throat usually spotted, .sometimes with red; the tail is, in shape, more like that of the old 

 male. 



ITab. Eastern Xorth America to the high Central Plains; south to Brazil. Localities: 

 Cordova (.Sci,. I'. Z. S, 18.")(!, 2S8) ; Ciiateiiiala (.^cl,. Ibis, T, I2f)) ; Uiiba (Cab. J. IV, 

 98; (iuiidl. Kep. I, 18(50, 2',)1) ; S. E. Texas (Dkksskk, Ibis, 1805, 470, breeds) ; Veragua 

 (Sai.v. p. Z. S. 1870, 208). 



The Trorliilm nurrii/nnicr (itiirn'i/itln ?) of Lawrence, described from an 

 alcoholic .specimen in the Smithsonian collection, differs in having a 

 green throat, liccoming golden towards the chin. It is quite probable, how- 

 ever, that the difference is the result of immersion in spirits. 



The red of tlie throat apjiears paler in some Mexican and Guatemalan 



