INSESSORES. 287 



Petroica bicolor than of any other. They are of a Hght 

 greenish blue, freckled and spotted with minute indistinct 

 markings of brown ; their medium length is ten lines, and 

 breadth seven and a half lines. 



Although I have paid considerable attention to the distri- 

 bution of this species, I have never been able to meet with it 

 on the continent of Australia, or in any other country than 

 Tasmania. It is very numerous about Hobart Town, both 

 in the gullies under Mount Wellington, and on the opposite 

 side of the Derwent towards Clarence Plains. 



Its note is low and monotonous, without any peculiar cha- 

 racter. 



The sexes are alike in colour. 



Head, and all the upper surface reddish brown tinged with 

 olive ; wings and tail brown ; primaries and secondaries 

 crossed by a narrow line of white at the base ; the outer tail- 

 feather on each side margined externally and at the tip with 

 white ; under surface pale brown, passing into bufFy white on 

 the vent and under tail-coverts ; irides, bill, and feet blackish 

 brovm. 



The young is very dark brown above, striated with deep 

 buff; beneath mottled brown and buffy white; the latter 

 colour occupying the centre of the feathers. 



Genus PCECILODRYAS, Gould. 



On reference to the figures of the birds I have called 

 Petroica ? cerviniventris and P. superciliosa in the third 

 volume of the folio edition and in the Supplement, it will at 

 once be seen that these two species cannot be associated with 

 either of the preceding genera, and must be separated into a 

 new one ; this division I have accordingly made, and assigned 

 to it the above appellation. 



