210 Proceedings of the Royal Society of Victoria. 



band of the tail naiTOwer and more concentric in form. Bill, 

 bluish-white graduating through bkiish horn colour into bluish- 

 black at the tip ; irides, hazel ; legs, black. 



Adult Jeiiiale. — Differs conspicuously in having the back black 

 instead of white ; back of neck and lower back being of a mottled 

 appeai'ance where the dark feathers are tipped with white, the 

 mottle at back of neck blending into a white nape ; the other- 

 wise black plumage is browner in tone than on the male, especially 

 on the under parts and primaries. 



Gyiiniorhina hyperleuca. 



Adult male. — Glossy bluish-black or glossy black, except nape, 

 hind neck, back, up^^er and under wing coverts, upper and under 

 tail coverts, tail (except the terminal band and outer web of 

 either of the outermost feathers) and vent, white ; edge of wing, 

 white mottled with black ; bill, bluish horn colour graduating 

 into black at the tip ; irides, clear or bright hazel ; legs, black. 



Adult feijuile. — Differs in having the hind neck and back grey, 

 and the primaries and terminal l)and of the tail brownish-black. 



Comparative Dimensions in Inches. 



