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white there, on the inner webs of the lateral feathers ; and with a 
faint silvery greyish shade or bloom, about the middle of the 
exterior webs. In the perfect form of this type there is not 
the faintest trace of any bar, on any of the feathers. Then 
there is precisely the same tail, as it were bleached, the cinna- 
mon being confined to the tips and the outer margins of both 
webs of the central feathers, and to the tips and outer margins 
of the exterior webs only, of the lateral feathers ; all the rest 
being pure white. hen there is the same tail as the last de- 
scribed, with the white on the central feathers ; and the external 
webs of the lateral feathers, replaced by a silver grey, only 
slightly browner, than that of the exterior webs of the earlier 
primaries. Then we have each of these three forms of tail, more 
or less barred, with every intermediate form between a mere 
trace of a single narrow brown bar, near the tip, up to ten 
narrow, well marked but wavy, and irregular, transverse brown 
bars. There is still another type of tail, in which the central 
feathers are a uniform, dull, earthy brown, except along the 
shafts, where alternate, irregular patches, of a slightly darker 
brown, and dingy fulvous, remain as it were traces of the fully 
barred tail. The outer webs of the lateral tail feathers, are in 
this form, a nearly uniform brown, with but little traces of the 
markings exhibited by the central tail feathers, but the inner 
webs are dull fulvous, growing white towards the bases, with 
numerous, broad, irregular, freckled, brown bars, becoming obso- 
lete towards their bases. Between this form, and the grey 
banded one, every intermediate stage occurs. The rest of the 
upper plumage, in specimens exhibiting this latter form of tail, 
is a uniform, dull, pale, hair brown, without a trace of rufous 
anywhere, but darker on the rump, the longer scapulars, and 
primaries, and somewhat paler on the head, (where owing to 
the white bases of the feathers showing through, a good deal of 
white is intermingled) and the median wing coverts. ‘The sil- 
very grey tinge, of the outer webs of the primaries, of this form, 
is inconspicuous, and overlaid with brown. ‘The upper plumage 
of the specimens with bar-less tails, is much richer, and in fact 
so different from that just described, that but for the existence 
of intermediate links, one could scarcely believe in the identity 
of the two forms. Here we have the whole head, neck, and 
mantle, a rich rufous buff, the feathers with conspicuous dark 
brown centres; the feathers of the occiput conspicuously tipped 
blackish brown, so as to produce the effect of a sub-crest. ‘The 
rump rich blackish or deep chocolate brown, the upper tail 
coverts rich rufous, with traces of blackish brown bars. ‘lhe 
outer webs of the first four or five primaries conspicuously sil- 
vered, reminding one of the wings of the adult Circus Arugi- 
