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and in his notes upon the ornithology of Celebes and the Sanghir Islands (I. c.) he supposes the 

 plumage of the female and young male to be identical. It appears to me, however, that the plumage 

 of the hen bird is never quite so red as the young male [AH. beccarii, Salvad.), though I should 

 mention that none of the specimens which I have examined have any indication of their sex on 

 the labels. My adult female is probably the identical specimen of which the Marquis of 

 Tweeddale writes (Ibis, 1870, p. 42): — "Mr. Wallace possesses an example of what appears to 

 be the young male of a sixth species from Celebes." 



Dr. Bruggemann further writes to me : — " I am quite certain that I am right in pronouncing 

 the plumage of AH. beccarii to be that of the young male as well as the female of this species. 

 Not only do the two birds agree exactly in size and structure, but the currucarian plumage of 

 AH. flawstriata had never before been described. I have also examined several specimens in 

 transitional plumage. By these it is shown that the full plumage is obtained partly by moult, 

 partly by change of coloration, as indicated in my Celebes paper. The red edges to the quills 

 and tail-feathers appear to be worn off; and thus the wings and tail assume a uniform brownish 

 black colour." 



The figures in the Plate are drawn from an adult male in the Marquis of Tweeddale's 

 collection and from Count Salvadori's type specimen of AH. beccarii. 



v 



