Mr. R. B. Sharpens Cataloyue of Accipitres. 87 



these variations from the ordinary coloration of the adult 

 Harpy, from which this curious specimen did not appear 

 otherwise to deviate. 



In my last paper^ I hazarded the conjecture that two re- 

 markable Raptores from New Guinea, Harpyopsis nov(e~ 

 guinea and Megatriorchis dori(e, recently described by Count 

 T. Salvadori, might probably belong to the Hawk-Eagles; 

 but I find that, as regards the last-named species, such is not 

 the case. Mr. Sharpe, who had the opportunity of examining 

 the types of both these species during Count Salvadori's recent 

 visit to London, assures me that M. doriee comes nearest 

 to Urotriorchis macrurus, as, indeed, had been suggested 

 in Count Salvadori^s article on this subject, and that it 

 must therefore be considered a Goshawk rather than a Thra- 

 saetine Eagle. Harpyopsis novce-guinece seems, on the con- 

 trary, to be very closely allied to the genus Thrasa'etus ; and 

 I therefore consider it to be, like the Harpy, a bare-legged 

 Hawk-Eagle. 



The Circaetinse or Harrier-Eagles, to which group I now 

 propose to refer, are principally distinguished from the bare- 

 legged section of the Hawk-Eagles by the tarsi being reticu- 

 lated instead of scutellated; this is the case in all the six 

 genera which, as it seems to me, should be included in this 

 group, viz. Eutriorchis, Dryotriorchis, Spilornis, Herpetotheres, 

 Circaetus, and Helotarsus. In all these, except Helotarsus , the 

 tarsi are also of an elongated character ; and in all of them 

 the head is more or less broadly crested, except in Circaetus, 

 where the nuchal feathers, though showing a tendency to a 

 similar development, do not really form an actual crest. In 

 Spilornis, Herpetotheres, and Circaetus the wings are of 

 moderate length, though not reaching to the end of the tail ; 

 but in Eutriorchis, and to a somewhat less extent in Dryo- 

 triorchis also, they are remarkably short, whilst the tail is 

 elongated ; in Helotarsus, on the contrary, the tail is propor- 

 tionally shorter than in any other bird of prey, and the 

 wings extend considerably beyond its extremity. It may also 

 be mentioned that all the birds of this group, of which the 

 * Vide Ibis, 1877. p. 405. 



