Mr. R. B. Sharpe's Catalogue 0/ Accipitres. 435 



and from the other Hawk-Eagles to which I have hitherto 

 referred^ in having its extraordinarily powerful tarsi scutel- 

 lated instead of feathered — a peculiarity which it shares with 

 the remaining species of this group. 



I have nothing to add to Mr. Sharpens account of the 

 Harpy Eagle, except to suggest a doubt as to whether the 

 young bird described by him may not have made some pro- 

 gress towards the assumption of adult dress. I have a strong 

 impression that I have seen young birds of this species with 

 much less black about them than that described by Mr. 

 Sharpe ; but I am not able at the present moment to refer to 

 such a specimen, or to give the description of such a one in 

 detail, and I will therefore pass to an allied species from 

 Tropical America, Morplmus guianensis, which appears, from 

 its elongated tarsi and short toes, to lead naturally to the 

 next group which I shall have to notice, the Circaetince, or 

 Harrier-Eagles. 



As Mr. Sharpe does not describe the immature plumage of 

 M. guianensis, I add the following particulars, which I noted 

 from an immature specimen in the Brussels Museum : — 

 Entire head, back of neck, and crest pure white; entire 

 mantle very pale brownish grey, finely vermiculated with 

 darker markings of the same ; these on the scapulars assume 

 the form of six irregular transverse bars, and of three similar 

 bars on the primary coverts ; lower back and upper tail- 

 coverts pure white ; bastard wing blackish slate-colour, with 

 two transverse bars and a tip of pale mottled brownish grey ; 

 primaries with four to five such bars (the uppermost partly 

 white) and a light tip ; the secondaries and tertials with similar 

 bars and a broad pale tip ; tail with ten dark transverse bars, 

 between which are narrow interspaces mottled with two 

 shades of brownish grey, tip of tail whitish ; similar bars are 

 apparent on the under surface of the tail ; entire remainder 

 of the under surface of the bird pure white. 



Before concluding my remarks on the Thrasaetinse, I must 

 allude to two large birds of prey [Harjjyopsis nova-guinece and 

 Megatriorchis dorice) recently discovered in New Guinea by 

 Signor D'Albertis, which I have not seen, but which, I think, 



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