BROWN HAWK. 
peculiarity. A good series show these to be also constantly smaller than the 
typical I. h. orientalis, so I propose to name them 
leracidea berigora kempi, subsp. nov. 
I describe the type, a female killed at Utingu, Cape York, September 11th, 
1912, as follows : General colour above and below smoky-black or fuliginous- 
brown, rather lighter on the back and upper wing-coverts ; throat and a 
patch under the eye whitish ; black pronounced moustachial streak present. 
Primaries and secondaries uniform on outer webs, inner webs barred with 
light buff, but tips uniform. Tail feathers show smaU, rufous barrings on 
inner web. Wing 369 mm., tail 127, culmen 25, tarsus 70. 
From this series the male, female and immature are all alike : variation 
is seen, as the feathers of the under-surface have light bases and often the tips 
are white also in patches, more or less pronounced : in some cases the head 
is lighter but the shafts of the feathers remain dark, giving it a striped 
appearance. None ever approach the lightest phase, though some recall 
I. h. berigora, which is the interior phase of the country south of the 
Peninsula. 
The form which would bear the name 
leracidea berigora berigora (Vigors and Horsfield) 
would inhabit the interior of South Queensland and New South Wales. A 
couple of records from North-western Victoria suggest that it straggles there. 
I have not a series from Eastern South Australia, but aU records suggest 
that this is the only phase there met with, though it is possible the South 
Australian bird may be a separable race. 
The Central Australian birds are very pale and I propose to designate 
these as 
leracidea berigora centralia, subsp. nov. 
The type is a male collected by Captain S. A. White at the Finke River 
on February 28th, 1913. 
General colour above pale rusty brown, with black shaft-streaks ; the 
rump feathers are brownish rufous, with three or four bars of ashy-white and 
tipped with white ; tail-feathers pale brown, equally barred with narrow 
rufous bars and tipped with white. Upper wing-coverts like the back, the 
primaries and secondaries uniformly grey-brown on outer web ; inner web 
white with buff bars, and in the secondaries sometimes the buff markings 
appear on the outer web. Throat and cheeks white, divided by brown 
moustachial streak ; lower throat white with narrow dark shaft-streaks : 
sides of body and flanks rufous ; thighs white inside, outside brown, rest 
of under-surface including under wing-coverts white throughout. Wing 
315 mm., tail 175, culmen 21, tarsus 65. 
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