TOPAZ-THROATED HUMMING-BIRD. 143 



with metallic lustre, but which is somewhat diminished 

 by a grey tint which pervades the whole ; the gorget 

 is marked by brown feathers, which have a golden 

 lustre when placed in the light, but is not very distinct- 

 ly defined ; the vent is grey : the outer tail feathers 

 are of a dull green, the next pair are of a brilliant 

 violet, the others of a bright chestnut. 



These beautiful birds are found in Cayenne and 

 Guiana. * 



The figure of this bird is reduced one- half. 



