collected in Dutch New Guinea. 261 



The measurements are as follows : — 



Three adult males measure respectively : wing 202, 204, 

 204 mm. 



Two immature females measure respectively : wing 230, 

 236 mm. 



Two adult females from South-east New Guinea measure 

 respectively : wing 257 and 258 mm. 



" This Goshawk was rather scarce except in the moun- 

 tains.^'— C.i7. 5. 6^. 



Astur poliocephalus. 



Astur poliocephalus Gray; Sharpe, Cat. i. p. 117 (1874). 



Urospizias spilothorax Salvad. Ann. Mus. Civ. Genov. vii. 

 p. 900 (1875). 



Urospizias poliocephalus Salvad. Orn, Pap. i. p. 45 (1880), 

 Aggiunte, p. 18 (1889). 



Accipiter poliocephalus Roths. & Hartert, N. Z. xxii. p. 52 

 (1915). 



a. S ' Parimau, Mimika Hiver, 7th Sept. 1910. [No. 155, 

 C.H.B.G.'] 



h. ? . Canoe Camp, Setakwa River, 23rd Nov. 1912. 

 IC.B.K.'\ 



Male. Iris brown ; orbits scarlet ; bill black, cere and 

 gape scarlet ; feet deep orange. 



Female. Iris dark brown ; bill black, cere and orbital 

 skin orange ; feet orange ; claws black. 



Specimen a represents a male of typical A. poliocephalus 

 Gray, with the head and mantle much lighter grey than the 

 rest of the upperparts, and the underparts uniform white 

 tinged with grey on the sides of the neck and chest. 



Specimen h represents a female of typical A. spilothorax 

 Salvad., the upperparts being dark ash-grey and the under- 

 parts creamy-white inclining to buff on the belly, the breast 

 and sometimes also the belly being streaked with black along 

 the shafts of the feathers. 



It is difficult at first sight to believe that birds in this 

 plumage represent a younger stage of A. poliocephalus and 

 not a distinct species. The British Museum now possesses a 



