GENERA AND SPECIES. 177 



and O. Melanogaster, Grould, from Bolivia. All 

 in Grould' s cabinet. 



Trochilus(0reotrochilus) Chimborazo, Plate IX. 



Back and wings dusky ; two middle tail feathers 



dusky, the rest white tipped and edged with 



dusky; forehead steel blue, or intense violet; 



chest the same, enclosing a gorget of intense 



green, bounded by a stripe of velvet black; 



under parts white ; with a longitudinal stripe of 



black down the abdomen ; under tail-coverts 



; dusky black. Females plain, with the throat 



j dusky, laterally tinged with blue. 



Trochilus (Oreotrochilus) leucopleurus, Gould. 

 ; Head, all the upper surface, and wings, greyish. 

 olive brown, passing into dull coppery green on 

 (the upper tail-coverts ; two centre tail feathers 

 (green, with bronze reflexions ; lateral tail feathers 

 Idull white, margined externally and tipped with 

 Hull brown ; throat, rich luminous grass green, 

 pounded below by a crescentic band of deep 

 irelvety black ; breast and centre of the flanks 

 (pure white; the remainder of the flanks and 

 Centre of the abdomen, bluish black ; feet dark 

 plive brown ; bill black. 

 Total length, 4f inches; bill, 1 ; tail, 2f. 

 This species is very nearly allied to O. Estella, 

 I'ut differs from it in being somewhat smaller, 

 ; !nd in having the centre of the abdomen black 

 [instead of chestnut. 



j Trochilus (Oreotrochilus} Melanogaster, Grould. 

 i Jill the upper surface brown, with a golden lustre, 



