THE BIRDS OP AUSTRALIA. 
very fine series from West Australia, and find it agrees with other Ninox 
from South-west Australia) ; N. b. mixta nov., North-west Australia (type). 
Northern Territory (differs from N. b. boobook in its pale coloration and its 
pale under-surface with faint streaks) ; and N. b, lurida De Vis, North 
Queensland.” 
Since then I have added more forms as follows : 
“ Ninox boobook melvillensis {Austral Avian Record, Vol. I., p. 34, Apl. 2, 
1912). Differs from N. b. mixta in its very red general coloration and smaller 
size. This is the smallest subspecies of N. b. boobook. 
“ Type, Melville Island, Northern Territory, No. 10,796. 
“Range, Melville Island.” 
'' Ninox boobook macgillivrayi {Austral Avian Record, Vol. I., p. 194, 
March 20, 1913). Differs from N. b. boobook in its smaller size and lighter 
coloration throughout. Total length 320 mm. ; culmen 16, wing 218, 
tail 123, tarsus 40. 
“ Type, Cape York, North Queensland, No. 13,881. 
“ Range, Cape York.” 
“ Spiloglaux boobook clelandi {Austral Avian Record, Vol. II., p. 74, 
Dec. 29, 1913). Differs from 8. b. maculata in being very much darker 
brown, altogether lacking the reddish colour above. The tail is blackish, 
with the bars almost obsolete. 
“ Type, Flinders Island, 23rd November, 1912. 
“ Collected by Dr. J. B. Cleland.” 
“ Spiloglaux boobook leacJii {ib.). Differs from S. b. maculata in its 
larger size. 
“ Type, Victoria (East of Melbourne). 
“ Spiloglaux boobook tregellasi {ib.). Differs from S. b. marmorata in its 
much darker general coloration. 
“ Type, Frankston, Victoria, 13.4.1909 (North of Melbourne).” 
“ Spiloglaux boweri {ib.). Differs from all subspecies of boobook. 
“ Upper-surface uniform deep brown, darker on the head. Tail uniform 
brown, without any trace of bars either above or below ; wing-coverts like the 
back, scapulars with a large white spot on the outer web. Primaries quite 
brown with obsolete bars. Under-surface deep chocolate brown, spotted 
with white ; chin white, under tail-coverts chestnut brown, with twin white 
spots and tipped with dark brown ; feathers round the bill as in other species, 
under wing-coverts brown with white spots, quills light brown with large 
white spots on the inner webs. Length 340 mm. ; culmen 17, wing 221, 
tail 127, tarsus 43. 
“ Type, Peterson’s Pocket, Cairns, North Queensland, 19.12.1884.” 
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