li)4 David’s humming-bird. 
ed above, and beneath of a paler shade, tinted with 
yellow. The auriculars are of the same deep colour 
with the upper parts, and form a patch on the cheek, 
surrounded on the under part with a brighter shade. 
The tail is regularly graduated, the centre feathers, 
though longer, not far surpassing the others. It in- 
habits Cayenne. 
These are all the birds which Lesson includes in 
this form. The others do not possess any particular 
elongation of the centre tail feathers. The first we 
shall mention is the 
