OLIVE-BACKED SENBIRD. 137 
the remainder of the upper plumage, is olive-green, 
over which there is a strong tinge of yellow, with- 
out any of that metallic gloss seen on the head and 
neck : the side-featliers on the breast, just beneath 
the wing, are of a clear and delicate straw-yellow, 
while the whole of the body, belly, vent, and under 
tail-covers are of a deep and uniform cinereous- 
grey: the quills and tail-feathers are dark hair- 
brown edged with yellowish olive. 
Having a specimen of the Sou'i manga vert et 
gris of Yieillot now before us, we shall describe it, 
although we know not the country from whence it 
came. It differs from the above in being somewhat 
smaller, and in having the bill apparently less 
curved : the olive on the back is not so yellow : the 
shining green plumes of the head do not extend so 
low down from the nape, and they terminate on each 
side of the head just below the ears : the whole co- 
lour of the under plumage, from the chin down- 
wards, is of a clear and uniform cinereous, unbroken, 
as in all full plumaged birds, by any mixture of 
other coloured feathers, and without the slightest 
trace of any spot of green upon them. Now this 
may either be the full plumaged female, or a differ- 
ent species ; in which latter case it may retain the 
name of Cganocep/ialu s : but we are clearly of opi- 
nion that it is not a young male. 
Total length about 5 inches ; bill from the gape, 
t 9 5 ; wings, 2/g ; tail beyond, J ; ditto, from the 
base, 1 ; tarsus, iV 
