190 
OLIVE-BACKED SUN-BIRD. 
tufts of primrose-yellow. The bird which we re- 
ceived in the same collection from Sierra Leone as 
the female, is, as we stated, about five inches and 
a quarter in length, and it agrees in plumage with 
the description of Yieillot’s “ Soui-manga vert et 
yris .” The crown, nape, cheeks, and sides of the 
neck are of the same rich bluish green seen in the 
male, the back and wings are also similar in tint, 
but the whole chin and under parts are of a uniform 
greyish white, paler on the vent, and there tinted 
with yellowish oil-green. We have little doubt of 
this being the female ; there is no trace of imma- 
turity in the specimen. 
We have also, among the African forms of even- 
tailed Sun-birds, species of uncommon brilliancy of 
colouring ; and which, as in the Humming-birds of 
the New World, possess a coronal and gular patch 
of resplendent scale-like feathers. Examples of 
these will be seen in some of our next plates. 
