﻿Hah. Marianne Islands (Quay and Gaimard), Pelew Islands {mm. Godeffroy), 

 Batchian (Bernstein), Morty Island (Bernstein), Gilolo (Wallace), Mysol ( Wallace), New 

 Guinea (Wallace, von Rosenberg), New Ireland (G. R. Gray), Solomon Islands (Brenchley). 



The present species was originally brought from the Marianne Islands by the Expedi- 

 tion of the " Uranie and Physicienne," and ]Jr. Pucheran is inclined to consider the bird 

 from these islands as specifically distinct from that of New Guinea and the Moluccas ; but I 

 think there is very little chance of these two birds being distinct, for the recent researches 

 of Mr. GodefFroy's collectors have shown us that the species is found in the Pelew Islands, 

 and it would be unlikely that the bird occurring in the Marianne Islands, which are 

 situated to the northward, would be of another species. I incline to the opinion that it is 

 perhaps migratory, ranging from the Mariannes southward directly through the Moluccas 

 to New Guinea, and then to the eastwards to the Solomon Islands ; but this is mere con- 

 jecture which it will remain for future observations to confirm or dispel. 



Old birds of H. albicilla have the head all white as represented in the plate, and I 

 believe the very dhTerent-looking bird which forms the hinder figure is nothing but the 

 very young of the present bird, for it is not uncommon to find a white-headed bird with 

 the remains of a few green feathers on the crown, while Dr. Hartlaub mentions (I.e.) 

 several intermediate forms of plumage. 



Mr. Wallace informs me that the present species "frequents the rocky and forest-clad 

 sea-coasts of New Guinea, Waigiou and Gilolo, feeding on fish and small crustaceans." 



The description of the old bird is from a skin in my own collection obtained by Mr. 

 Wallace in New Guinea, while the young bird is from a specimen from the Pelew Islands 

 obtained from Mr. Godeffroy. The figures are drawn from the same birds. 



A 



