260 Mr. J. H. Gurney on some Hawks of the 



Norwich Museum may therefore prove acceptable to the 

 readers of 'The Ibis :' — 



The forehead is black next the cere, the adult dress having 

 apparently been there assumed ; on the remaining upper part 

 of the head the feathers are white at the base, then bright 

 rufous for a short space, and beyond that are largely tipped with 

 dark rufous brown, the white bases of the feathers being most 

 conspicuous on the hinder head ; the nape is blackish brown, 

 slightly tinged with rufous, and probably shows the com- 

 mencement of adult coloration on that part ; the sides of the 

 head are coloured like the nape, but are hardly so dark ; over 

 the eye is a yellowish-white eyebrow, with dark hair-like 

 shaft-marks on each feather; the entire mantle, with the 

 exception of three adult black feathers, is a rich rufous, 

 broadly crossed with blackish-brown transverse bars ; all the 

 wing-feathers are similarly coloured and cross-barred; but the 

 tertials and the inner webs of the secondaries and primaries 

 have a ground-colour which, except towards the tips, is a 

 paler rufous than the rest of the upper surface ; the ground- 

 colour of the tail is rufous, considerably suffused with slaty 

 grey on the basal moiety of the rectrices, this tint being 

 strongest on both webs of the central pair, and limited on 

 the other rectrices to the external webs only, the tail is 

 crossed by dark blackish-brown bars, of which there are eight 

 on the central, and sixteen on the external rectrices; the 

 ground-colour of the entire under surface, from the chin 

 downwards, is a paler rufous than the upper parts ; the centre 

 of the throat and the chin exhibit pure white feathers inter- 

 mixed with those that are fulvous; and the sides of the throat 

 are fulvous white, mingled with blackish brown ; these parts 

 show evident marks of the commenced assumption of adult 

 plumage, as does also a single pure white feather on the 

 breast; with the exception of this feather the breast and 

 flanks are a clear rufous, with broad sagittate marks of dark 

 rufous brown on the centres of the feathers ; the under wing- 

 coverts are a bright rufous brown, with a few dark shaft- 

 marks and one white adult feather ; the axillaries are pale 

 rufous, crossed with bars of dark rufous brown ; the tibiae are 



