Zoological Society. 



153 



in another there are several purple feathers irregularly scattered 

 with the ordinary golden green ones on the back ; perhaps in the 

 adult bird this purple is the prevailing colour of the back. 



This small-sized species is remarkable for the shortness of its beak, 

 which is acutely pointed, and a little dilated in the middle. 



Trochilus Derbianus. T. rostro recurvo, quoad longitudinem, 

 corpus cum capite cequiparante ; caudd mediocri,paululum furcatd: 

 colore viridi, corpore subtus albido variegato ; guld nigrescente. 



$ Long. tot. 8 unc. ; rostri, 3§ ; alee, 3 ; caudec, 2J. 

 ? 71 , 2| ; — , 3 ; , 2. 



Bill immensely long, and somewhat recurved, equal in length to 

 the head and body ; tail moderate, slightly forked ; head and upper 

 parts of body green, with golden and bronze reflections ; wings pur- 

 plish-black ; tail blackish, tinted with bronze, the central feathers 

 being the richest ; chin and throat dusky, each feather very obscurely 

 tinted with bronze in the middle, and edged with ashy-white ; belly 

 and vent green ; the feathers edged with white, or in parts greyish, 

 those on the chest are whitish, with a large green spot near the apex ; 

 under wing-coverts green. 



The female has a shorter beak ; and there is more white on the 

 under parts of the body ; the feathers on the throat and chin are 

 somewhat variegated with yellowish. 



Trochilus aurogaster, Loddiges' MSS. T. rostro fere duplo 

 quam caput longiore ; caudd mediocriter latd et furcatd ; plumis 

 corporis permagnis, et suprci et subtils : colore splendide viridi ■ 

 tectricibus caudce plumisque abdominis nitide aureo relucentibus ; 

 notd gulari purpureo-cozruled, necnon apud frontem notd, luce 

 favente, gramineo-viridi • crissi plumis aureo-viridibus, ferrugineo 

 marginatis ; alarum primariis fuscescenti-nigris non sine ceneo ni- 

 tore ; caudd ex-aureo-ceneo-viridi. 



In the female the throat is of a rusty yellow tint, and is sparingly 

 spotted with green ; the belly and vent are of an ochreous colour, 

 with heart-shaped green spots ; on the former the green predomi- 

 nates, and on the under tail-coverts the yellowish tint prevails. 



This species is of moderate size ; that portion of the under man- 

 dible which shuts into the upper one is white. 



Trochilus fuscicaudatus. T. rostro qutlm caput longiore ; caudd 

 subrotundatd : colore ex aureo viridi ; plumis gulce, pectoris, et 

 abdominis, albido marginatis ; plumis analibus albis ; crisso fusco, 

 rectricibus caudce submetallice castaneis, nigrescente marginatis ; 

 remigibus alarum nigrescentibus, purpureo paululum relucentibus ; 

 mandibuld inferior e (apice excepto), necnon superioris basi, pal- 

 tide fuscis. 



Long. tot. 4 unc. ; rostri, J ; ala, 2 ; caudce, 

 Hab. Chachapayas, Peru. 



Trochilus cyanopterus, Loddiges' MSS. TV. rostro quam caput 

 multo longiore ; caudd latissimd et leviter furcatd : colore intense 

 viridi, ad nigrum He atque illtc vergente, prcesertim apud caput ; 



