10 



Gen. Char. — Bill longer than the heud, almost cylindiical, but 

 slightly curved downwards ; wings rather large and powerful ; tail 

 large and rounded, the feathers narrow, rather pointed and rigid ; 

 feet strong, the hind-toe and nail about equal in length to the middle 

 toe and nail ; tarsi clothed with feathers. Throat luminous, bounded 

 below by a distinct collar. 



I propose this term as a generic appellation for a section of the 

 Trochilidce, ^vhich has hitherto only been found immediately beneath 

 the line of perpetual congelation, where they feed upon the insects 

 ■\vhich resort to the newly expanded flowers. The type is 



Sp. 1. Okeotrochilus Estella. 



Orthorhynchus Estella, D'Orb. Voy. Am. Birds, pi. 6. 



fig. 1 ; D'Orb. et La Fres. in Guerin's Mag. de 



Zool. 1838, p. 31. 

 O. CecilicE, Less. Rev. Zool. 1839, p. 43. 



Sp. 2. Oreotrochilus leucopleurus, sp. nov. Oreot. capite, cor- 



pore superiore, aliscue, olivaceo-fuscis, griseo tinctis ; tectricibus 



caud(e superioribus sordide aneo-viridibus ; rectricibus duabus bi- 



termediis viridibus, cEneo splendentibus ; rectricibus lateralibus 



sordide albis, apicibus et marginibus exterioribus fuscis ; gula lu- 



minose viridi, fascid semilunari holosericd atrd infrti ornatd ; 



medio abdomine lateribusque nigris ; mediis sed lateribus et pec- 



tore albis. 



Head, all the upper surface and wings greyish olive-brovvn, passing 



into dull coppery green on the upper tail-coverts ; two centre tail- 



feathers green, with bronze reflections ; lateral tail-feathers dull 



white, margined externally and tipped, dull brown gradually blend- 



ing into the vvhite ; throat rich luminous grass-greeu, bounded belo\v 



by a crescentic band of deep velvety black ; breast and centre of the 



flanks pure white ; the remainder of the flanks and centre of the 



abdomen bluish black ; feet dark olive-brown ; bill black. 



Totai length, 4į inches ; bill, 1 ; wing, 3į ; tail, 2|. 



This species is nearly allied to the preceding, but differs from it 



in being some\vhat smaller and in having the centre of the abdomen 



black instead of chestnut. 



Hab. The Chilian Cordilleras. 



Sp. 3. Oreotrochilus Chimborazo. 



T. Chimborazo, Bourc. in Rev. Zool. Sept. 1846, p. 30.5. 



Sp. 4. Oreotrochilus Adela. 



Orthorhynchus Adela, D'Orb. Voy. Am. Birds, pi. 61. 

 fig. 2 ; D'Orb. et La Fres. Mag. de Zool. 1839. 



Sp. 5. Oreotrochilus melanogaster, sp. nov. Oreot. omni cor- 

 pore superiore oUvaceo-fusco aiireo nitente, tectricibus caudce su- 

 perioribus viridi lavatis ; alis yriseo-fuscis purpureo splendentibus ; 

 guldfulgente viridi, pectore et abdomine intense cyaneo-atris. 



All the upper surface olive-brown, with a golden lustre, and 

 ■\vashed \vith green on the upper tail-coverts ; wings greyish brown, 



