THE BIRDS OF AUSTRALIA. 
from N. Australia than that of those from Queensland, as will be seen from 
the subjoined measurements : 
Specimens from Queensland . . 
$ culmen 
45 mm. : 
genys 30 mm. 
>» »» 
S 
46 
32 
6 
51 
34 
N. Australia .. 
a 
55 
37 
$ 
55 
35 
$ 
56 
36 
“ As regards the present specimen of G. stellatus, the difference in the 
size of the body between it and the larger species is striking. On the other 
hand, the difference in the size of the bill is comparatively less when compared 
with the specimens from Queensland. On account of insufficient materials, 
it is impossible to determine whether the unspotted body in the present 
female is an invariable and specific characteristic by which this species can 
be separated from the larger species (in which the females are known to be 
always spotted). 
“ Hab. Dr. Dahl did not meet with C. stellatus in separate flocks, but 
only in the company of the larger species. The preserved specimen was 
shot amongst C . ?nacrorhynchus , which appears everywhere throughout 
Arnhem Land, where it was, as a rule, seen in flocks of about six individuals. 
Likewise in the neighbourhood of Roebuck Bay (further to the southward) 
these large black Cockatoos were numerous, and assembled in great flocks, 
especially during the dry season, at those spots where water was to be found. 
Many were shot as food for the expedition. Amongst these flocks of C. 
macrorhynchus there were occasionally seen individuals which appeared to 
be smaller than the others, and which might be assumed to have been 
C. stellatus .” 
In the Nov. Zool., Vol. XVIII., Jan., 1912, was published my “Reference 
List ” to the Birds of Australia. In that List I endeavoured to indicate the 
multitudinous sub-specific forms of birds that could be discriminated were 
series available. With all its faults it marked an advance, as thereby was 
placed on record all the names and forms at that time recognisable and 
the now universal trinomials introduced on a large scale into Australian 
ornithology for the first time. My treatment of this species reads : 
“ Calyptorhynchus banksii banksii (Latham). 
New South Wales. 
“ Calyptorhynchus banksii northi nov. 
“ Differs from C. b. banksii in its smaller size : wing 400 mm. 
North Queensland. 
118 
