I ('ill 



N(»i!TlI AMKItlCAN BII!I)S. 



pliU'c called Chiiiiaclioyo iiciii' Caldcras, in the Vnlcan de Fuego, and otlicv 

 speciiiu'iis taken in the tirrra ralinitc, near (Joban, showing that, like many 

 dtlier s])ecies, it is t'miiid in very diilerent eliniates. 



CiMs HELIOP^DICA, (JdiiD. 



Hc/iojiivi/ini, (ii.ii.i), Mdii. Timhilida', 11, liitioil. Tioi:iiil. 1861, 00. (Type, Trocldlus 



Virliniilllls, SwAINSdN.) 



Gen. Cii.u!. Hill Idiiyci- than head, depressed, broad at it.'* exposed base; the frontal 

 leathers not inlvancinfr forward beyond tiie beginniiijf of the nostrils, nor so far as those 



of the ehin. Hind toe shorter than the lateral, 

 tarsi feathered ; outer primary not attenuated. 

 Tail nearly even, sliprhtly rounded and einarginate, 

 the feathers broad, the webs nearly even. Metallic 

 feathers of tiuoat not elongated. Female quite 

 similar in form. 



Heliopaulica xatUusi 



TIii.s genus is quite peculiar among those 

 of Nortli America in the exposure of tlie 

 base of bill, which is entirely bare between 

 the lengthened nostrils, instead of covered 

 by the frontal featliers. Tliis makes the 

 bill appear very broad, althongli it really 

 is more so than in the other genera. The i'eatliers on the chin extend con- 

 siderably beyond those of the forehead, instead of to about the same line. 

 The tail and its feathers are much broader than in the other genera. 



The two Icnowu species of this genus may be distinguished by the follow- 

 ing characters : — 



Common Cihractkrs. Above metallic green ; tail plain black or chestnut, 

 glossed with green, and without white in either sex. A conspicuous white post- 

 ocular stripe, iiiid a blaekisii auricular one beneath it; lieneath. with more or less 

 green. ^. Forehead, chin, and side of head deep black or metallic dark blue; 

 throat and jugulum lirilliant green. 9 . Front dull brownish-green ; chin, throat, 

 and jugidum whit(> or ochraceous, with or without a green glo.ss. 



H. niptanotis." .]fii!e. Belly white, glossed with green ; tail black beneath ; 



base ol bill, all round, brilliant blue; white cheek-.stripe beginning back of 



llie eye. Female. Beneath white glos.sed with green; tail bluish-black. 



Il'ih. Ouatennla and table-lan<ls of Mexico. 



H. xantuBi. Male. Belly cinnamon; tail beneath purplish-cinnamon ; chin 



lilack; white cheek-stripe beginning at the liill. Femnle. Beneath plain pale 



rufous; tail deep rufous. Iliib. Cape St. Lucas. 



» Jlelinpminu i:\i-l aunt is, (SwAiNs.^ f!iM-|.i>, .Monog. Troch. II, pi. Ixiv. Trochilus mclanotux, 

 .Sw.viNs, Phil. Mag. 1827, 4-tl. Trockilm letccotis, ViEiLL. Ornismyia arsenni. Less. HhIi. 

 Mi'xi(,'r) and Guatemala. 



