SLENDER OR GREY TEAL. 
is possible without long series being collected under the most favourable 
conditions. In North Queensland again the Grey Teal appears to be only 
found. The study of a series from this locality would tend to limit the exact 
variation in size and coloration due to sex and age. 
I have here recognised — 
Virago castanea (Eyton). 
The Green-headed Teal. 
Male and female alike in full adult plumage : immature plumage 
probably similar to adult of succeeding species. 
Virago gihberifrons rogersi (Mathews). 
The Grey Teal. 
Male and female alike all the year round, and resembling the immature 
plumage ; no brilliant plumage ever taken on. 
The former confined to the South of Australia, ranging from 
North-west Cape to north New South Wales and Tasmania. 
The latter ranging all over Australia, quite commonly in the North, 
and Tasmania. 
The bird figured and described is a male and was collected at Parry’s 
Creek, North-west Australia, on the 13th of February, 1909, by Mr. J. P. 
Rogers. 
VOL. IV. 
113 
