490 
Mr. J. H. Gurney's Notes on 
webs being speckled with the same; the primaries and secon¬ 
daries are wood-brown, faintly barred with transverse mark¬ 
ings of the same colour, but of a darker hue/ and slightly 
tinged with rufous on the inner web; the feathers on the 
lower back are of a darker dove-colour, tipped with rufous 
and with concealed white bases; the upper tail-coverts are 
similar, but many of them are barred with pale luteous, which 
occupies most of the outer web on the exterior feathers of 
these coverts; the upper surface of the tail is crossed by eight 
dark transverse bars, of which the lowest is broader than the 
others, subterminal, and distinct; the three bars above the 
lowest are edged, above and below, with rusty brown, this 
being especially observable on the central rectrices; the inter¬ 
spaces between the dark bars are white near the base of the 
tail, gradually becoming grey as the tip is approached; the 
under surface of the tail shows seven indistinct dark bars, with 
yellowish grey interspaces; the throat is yellowish white, 
and the whole under surface thence to the vent is a rich 
buff, varied by darker shaft-marks, which are broadest on the 
upper breast and flanks; the tibiae are buff, with narrow trans¬ 
verse bars of a darker hue of the same; the under tail-coverts 
resemble the thighs, except that the transverse bars are further 
apart; the wing-linings are of a very similar character to 
the under tail-coverts, but the transverse markings are less 
regular. 
Amongst the birds that in many respects are nearly related 
to the genus XJrubitinga, must be reckoned that scarce and 
curious species discovered by Tschudi in Peru, and described 
by him under the name of Circaetus solitarius , for which the 
late Jules Verreaux subsequently proposed the generic title 
of Urubitornis , and also that somewhat better known, but 
also uncommon species. Harpy halia'etus coronatus. 
I agree with Mr. Sharpe that both these birds may very 
properly be referred to the genus Harpykaliaetus ; but I can¬ 
not concur in his view that they should both be referred to 
the same species, as, although they agree in form and dimen¬ 
sions, they differ in H. solitarius being always (when adult) 
