2:62 Mr. W. R. Ogilvie- Grant on Birds 



series o£ seven males and females o£ A. spilothora.v, all 

 practically alike in plumage. None of them are in moult, 

 and there is nothing to suggest any transitional stage between 

 A. spilothorax and A. poliocephalus. It must, however, be 

 noted that in all the streaked birds there are faint traces of 

 light buffi or rufous edges to the feathers of the mantle, and 

 the quills, especially the secondaries, as well as the tail- 

 feathers, have narrow brownish-white margins to th6 tips, 

 which undoubtedly seem to indicate immatarity. Count 

 Salvador! is therefore no doubt right in his belief that 

 the two forms represent one species. Our specimens can 

 neither prove nor disprove it^ but I feel pretty certain that 

 birds in the plumage of A. spilothorax are merely immature 

 examples of A. poliocephalus in first plumage. 



In the first plumage all the feathers of the upperparts 

 have the basal half white : in the second or adult plumage 

 the feathers below the mantle are grey to the base. 



The following is a list of the specimens in the British 



Museum : — 



A. polioce2)hctlus Gray. 



Wing, 

 mm. 



(^ . Parimau 188 



[c?]. Astrolabe Range 192 



[J]. Arfak Mountains 195 



2 . Aru Islands (type) 208 



$. Bujakori 223 



A. apilotliorax Salvad. 



Wing, 

 mm. 

 J. Fergusson Island .. 190 



[c?]. Port Moresby 190 



[ J ]. Owen Stanley Mts. . . 200 

 S . Wedan, B. N. Guinea 195 



[J]. Salawatti 199 



2 . Setakwa River 219 



$ , Fergusson Island . . 219 



" I saw three examples only o£ this Grey-and-White 

 Goshawk, all at Parimau, in the depths of the jungle. It is 

 a very shy bird and has a silent flight like that of a Sparrow- 

 Hawk. On one occasion I saw one drop to the ground on 

 some prey, not thirty yards from me, but it came down so 

 lightly that I thought it was merely a bunch of leaves falling 

 from a tree. It was not till I went to investigate that I 

 discovered my mistake, and before I could shoot the bird 

 had slipped round the bole of a great tree and was lost to 

 sisht."— C.//. j5. G'. 



