Mr. R. B. Sharpe's Catalogue of Accipitres. 469 



remaining old feathers, which arc a dark chocolate-brown ; 

 the feathers of the hinder head^ napCj and sides of neck have 

 pure white bases, which occupy so large a portion of the fea- 

 ther as to be only partially concealed, and therefore more 

 conspicuous than the white bases of other portions of the 

 plumage'^; the sides of the head are entirely blackish brown, 

 except a white line above and below the eye ; many old fea- 

 thers on the right side of the throat and breast have white 

 edgings, and there is a slight admixture of white in the colo- 

 ration of the lower abdomen; but, with these exceptions, the 

 entire under siu'face is blackish brown, the new feathers 

 being everywhere darker than the old ; the tail, which is 

 unmoulted, is dark chocolate-brown, crossed with indistinct 

 bars of a paler brown ; five whitish spots or imperfect bars 

 are to be found on the inner web of the external rectrices, 

 and similar white bars are observable on the outer webs of 

 the exterior feathers of the upper tail-coverts. 



I propose now to notice the genus Henicojjernis, consisting 

 of a single species inhabiting New Guinea and also occur- 

 ring in some of the adjacent islands. This species is nearly 

 allied to the genus Pernis (which I intend to consider in my 

 next paper), but is generically separable from it in having 

 the foot, and especially the outer toe, considerably smaller in 

 proportion, and also on account of the greater development 

 of the tail and of the more elongated character of the feathers 

 which clothe the sides of the head. 



Two localities for this bird may be added to those men- 

 tioned by Mr. Sharpe, viz. the island of Misori, as recorded 

 in Salvadori^s ' Prodromus,^ p. 4, and the New-Britain group 

 of islands, whence a specimen was recently sent by the 

 Rev, G. Brown, which, by the kindness of Dr. Sclater, I have 

 had the opportunity of examining. It is apparently in imma- 

 ture dress ; and as this stage is not described in Mr. Sharpens 



* MM. Milne-Edwards and Grandidier, in describing the two fuliginous 

 examples at Pans, give the following particidars : — " leurs parties supe- 

 rieures sent d'un brun roussatre fence, toutes les plumes ayant leur base 

 blanche ; la nuque est coupee par un collier blanc " {vide op. cit. p. 77 and 

 plate 24). 



SER. IV. VOL. III. 2 M 



