Mr. R. B. Sharpe’s Catalogue of Accipitres. 229 
daries, are fawn-coloured, this tint being unbroken along the 
ridge of the wing, but elsewhere varied with a slaty-black 
centre to each feather, which become more conspicuous in pro¬ 
portion as they recede from the ridge of the wing; the primary - 
and secondary-coverts are slaty black, some of the inner webs 
being tipped with whitish, and all the outer webs with fawn- 
colour ; all the quill-feathers of the wing are black, with a 
tinge of grey on the outer webs, and with fawn-coloured tips; 
the secondaries also show some dark but rather indistinct 
transverse bars ; the upper surface of the tail is dark slate- 
colour, with eight transverse bars of a darker hue visible on 
the middle rectrices, these bars being less distinct, and as¬ 
suming more the character of mottling, towards the sides of 
the tail; all the rectrices have narrow fulvous tips. The entire 
under surface is fawn-coloured, decidedly paler than the back, 
and with no dark markings, except a few narrow shaft-marks 
on the breast; the wing-linings and throat are paler than the 
rest of the under surface; and the chin is nearly white; but 
with these exceptions there is hardly any perceptible vari¬ 
ation in the tints of the underparts.” 
It will be seen by the above that in this Eagle the general 
coloration is paler, and the contrast of tint upon the parti¬ 
coloured feathers much less marked, than in the ordinary 
typical adults of A. rapax , from which it also differs in the 
almost entire absence of variegation on the underparts. These 
peculiarities are remarkable, and the more so as the bird, 
when I saw it, was about eleven and a half years old; but I 
am disposed to regard them as resulting from confinement, 
having met with a similar phenomenon in a Mogador speci¬ 
men recently presented by Lord Lilford to the Norwich Mu¬ 
seum. This specimen, which was the original of the lower 
figure on pi. v. of f The Ibis ’ for 1865, lived for nine years 
in Lord Lilford^s possession, and in great measure retained 
its immature dress till it died, its plumage then exhibiting 
still less of the variegation of tint characteristic of the normal 
adult dress than w T as visible in the Antwerp specimen at the 
time when I saw it. Both these cases are probably parallel 
to those of the two Imperial Eagles which so long retained 
SER. iv. —VOL. i. 
R 
