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seal-l)rowu or some other dark tinge of brown, is absolutely devoid of 

 scattered grey hairs. But parallels to what has been described 

 above in Pt. h. ccmus and lepidus—viz., an extensive or even almost 

 complete replacing of the seal-brown by light grey hairs — are rare 

 within the genus. Perhaps the two most noteworthy instances are 

 these : in Pt. inelanotus (nicoharicus, auct.) the back is usually 

 blackish seal-brown, with a few greyish-white hairs, as a rule, detectable 

 on close examination ; but in the island of Nias, Pt. nielanotns 

 is replaced l\v a distinct, though closely allied, species, Pt. niadicvs, in 

 which the seal-brown is thickly mixed with light grey (but the amount 

 of greyish admixture individually variable, as in the case of Pt. h. 

 ccunua and lepidus). In Pt. melanopogon (Amboina gBoup) the back 

 is glossy blackish seal-brown, in the Aru Island representative of the 

 melanojjogon group — viz., Pt. aruensis — silvery greyish, everywhere 

 thinly sprinkled with blackish hairs — that is, the seal-brown of 

 Pt. melanopoyon is almost completely replaced by silvery grey. This 

 latter is within the whole genus, the closest analogy to the modification 

 of the colour of the back in Pt. h. camts and lepidus. 



Measurements of fully adult individuals : 



