172 GREEN-RUMPED DOUBLE-COLL. SUN-BIRD. 
upper tail-coverts being of the same brilliant green 
with the head and back, and not rich violet-blue as 
in the bird from Southern Africa. 
In the bird from the Niger, the upper parts, 
wings and tail excepted, are of a very rich emerald 
bronzed green ; the wings and tail are brownish 
black, on the former the edges of the feathers being 
dull oil-green. The chin is deep velvet-black, 
shading into the neck and upper parts of the breast, 
which are similar in colour to the upper parts, and 
finish on the breast by a deep bluish green band, 
the prototype of the blue collar of the two former 
birds ; this is succeeded by the crimson band, nearly 
similar in extent to the same part in the N. chaly- 
beia, and having the tips of the feathers on the 
upper part of it narrowly edged with golden green, 
while the belly, flanks, vent, and under tail-coverts 
are of a pale oil-green ; the ample axillary tufts are 
rather paler in tint. In addition, we give the dimen- 
sion of the Cape and Niger birds : — 
CAPE. 
Entire length . . . 4 in. 6-10ths 
Bill to forehead . . . 7J-10ths 
Wing to longest quill . . 2 in. 3-lOths 
Tail from extremity of upper) j ^ 1-1 Oth 
covers . . . ) 
Tarsus 6-10ths 
We have not seen specimens 
Double-collared Sun-bird from the Western coasts 
of Africa which we could compare with those from 
the Cape, but it is not impossible that the bird which 
NIGER. 
4 in. t - 1 0th 
7-10ths 
1 in. 9-10ths 
7-1 Oths 
5£-10ths 
of the Lesser 
