15 



purpurascenti-rubrd nit ore ceeruleo ; menfi phimis cceruleis ; crisso 



albo. 

 Long. tot. 4 unc. ; rostri, ^ ; ala, 2^ ; caudce, 2|-. 

 Hab. Guaduas, Columbia. 



This species is of moderate size ; the general colour of its plumage 

 is deep rich green, with bi'onze reflections ; the wings are dusky, 

 with the upper and under coverts of the same green tint as the body : 

 the two central tail-feathers are tinted with bronze, both above and 

 beneath ; the remaining tail-feathers, which are broad, are black, but 

 in certain lights a very obscure purplish- green hue is observable ; 

 the feathers on the forehead are more compact than the remaining 

 feathers of the head ; in some lights they appear to be of a black 

 colour, edged with green ; in others they exhibit a most brilliant 

 green lustre. 



Trochilus cupreo-ventris. T. rostro quam caput pnululilm lon- 

 giore ; caudd brevi, subfiircata : femoribus albis ; colore splendidi 

 viridi, aureo et cupreo enitente ; crisso purpurascenti-cceruleo ;pri- 

 mariis nigrpscentibus ; caudd nigrd, purpurea tinctd. 



Long. tot. 4| unc. ; rostri, 1 ; ulx, 2| ; caudce, 1|. 



This species is remarkable for the richness of its colouring ; in 

 certain lights it appears as if it were powdered with gold and copper- 

 coloured particles ; the coppery hue prevails most on the belly ; and 

 the upper tail-coverts are of a purer green than other parts. 



Another blue-vented and white-thighed Humming-bird was de- 

 scribed under the name of 



Trochilus UROPYGiALis. T. rostro quam caput longiore ; caudd 

 mediocri, furcatd : colore corporis intense viridi, aureo relucente ; 

 rectricibus caudce fulgide aweo-viridibus ; guld crissoque ex pur- 

 purea splendide cceruleis ; abdomine nitide viridi ; alis nigrescenti- 

 bus ; caudd ex purpurea atrd ; plumis femaralibus albis, laxis. 



In the female the throat and chest are somewhat rusty, with green 

 spots, and the feathers on the bell)'- are variegated with whitish. 



This species is about the same size, and in many respects resem- 

 bles, the T. cupreo-ventris, but differs in having the general colour 

 less brilliant, whilst the feathers of the belly and the upper tail- 

 coverts are more brilliant, and present that compact striated appear- 

 ance which is always observable in those feathers which give that 

 extreme brilliancy to different parts of these birds : it differs, more- 

 over, in having a blue throat, and the belljr, instead of being cupre- 

 ous, is bluish-green. The upper tail-coverts in T. cupreo-ventris a,Te 

 of the same loose chai'acter as those on the back. 



Trochilus coruscus. T. rostro brevi ^ caudd latissimd, subfur- 

 catd, ex teneo fused : corpore supra, capiteque viridibus nitore au- 

 reo ; tectricibus caudm cupreis ; primariis purpurascentibus ; cor- 

 pore subtiis viridescente,fuscescenti-ochreo,preesertim ad crissum, 

 tincto ; lined gulari, ad pectus tendente nitidi viridi, apice purpu- 

 rascenti-rubra. 



Long. tot. 5^ unc. ; rostri, | ; al<B, 2| ; caudce, 2^. 



