Mr. R. B. Sharpe’s Catalogue of Accipitres. 325 
marks on the lower breast and thighs, which in specimen 
No. 4 are not present. 
A specimen from Panama, which was, some time since, in 
the possession of M. Boucard, and which I may call No. 5, 
much resembles No. 8, but has a few rather broad shaft- 
marks just above the centre of the crop. 
No. 6, an immature bird from Costa Rica, in the Norwich 
Museum, resembles No. 2 in the whitish edgings to the 
dark feathers of the crown; but the patch of dark colour on 
that part of the head is less extended in this specimen than 
in any other that I have examined, except No. 1; it likewise 
exhibits a considerable admixture of wholly or partially white 
feathers amongst the brown ones of the lesser and median 
wing-coverts, a peculiarity which I have not observed in any 
other example that has come under my notice; and it also 
has an unusual proportion of white mingled with the brown 
of the upper tail-coverts. This specimen has, to a slight ex- 
tent, commenced the assumption of the adult dress, simul- 
taneously with which the rufous edgings to the feathers of 
the upper surface have almost entirely disappeared ; the 
patches of dark-brown feathers on each side of the upper 
breast are present, as in No. 3, and three adult feathers of a 
dark greenish* slate-colour (one a secondary wing-feather, 
and the other two scapulars) have already made their ap- 
pearance. 
No. 7 is another Ecuador specimen belonging to Messrs. 
Salvin and Godman, and resembles No. 4, but is considerably 
more advanced, many grey feathers being mingled with the 
immature white plumage of the forehead, ear-coverts, nuchal 
collar, throat, and upper breast, and some adult feathers of. 
the dark greenish-slaty hue also appearing amongst the upper 
interscapulars. In this example some of the tibial and lower 
flank-feathers show a narrow dark shaft-mark, and on two of 
the former a decided blackish-brown spot is visible. 
A specimen in an almost precisely similar state of change, 
* This slight tinge of dark green on the feathers of the mantle is more 
decidedly present in some adults than in others, and is probably most 
visible when the plumage has been recently renewed. 
