THE BIRDS OF AUSTRALIA. 
In the Novitates Zoologicce, Vol. XVIII., p. 227, 1912, I separated the 
North-west Australia-Northern Territory bird from the South-east Austrahan 
t/ 
form on account of its shorter bill. I have not yet been able to account 
for the variation of that feature, but as some Eastern specimens have also 
short bills, for the present I am only admitting one subspecies as inhabiting 
Australia, though there can be little doubt that the Northern birds do differ. 
From typical birds, Australian ones can easily be separated by means 
of the colouring of the ornamental inner secondaries. In the latter the 
dark coloration is predominant, whereas in typical birds the white splashing 
is much more evident. 
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