MATHEWS— Birds of North and North-West Australia. li 



bluish black, passing into light bluish lead colour along the 

 .culmen, but not extending to the cere, the notch and a stripe 

 therefrom following the curve of the culmen, lead colour 

 gradually fading into the yellow of the bill, which colour is 

 brightest at the base, becoming of a whitish tint on the cut- 

 ting edge and on the stripe between the lead colour of the 

 culmen, and the streak from the notch; lower mandible bluish 

 horn at the tip, passing into greenish white and finally into 

 white at the base, cere and gape deep but not bright yellow, 

 the former lighter and almost white anteriorly; legs and feet 

 orange; claws black. 



This bird's flight is very swift, and all birds, large and 

 small, seem much afraid of it. 



111. Khyxchodox perigrinus submelanogenys. Western 

 Black-cheeked Falcon. 



Falco perigrinus sulmielanogenys (Mathews). Austral. Av. 

 Rec, Vol. I., p. 33, 1912. South-West Australia. 



No . 536— 5 . Length, 17.6 inches (10/11/86). 



Irides dark brown, cere and orbital space fine yellow. A 

 narrow ring of brown round the eyelid, bill bluish lead, be- 

 coming black at the tip of the upper mandible and shading 

 into yellowish horn at the base of both mandibles; legs and 

 feet bright yellow. 

 111. Falco loxgipennis aspleyi. Northern Little Falcon. 



Falco lunulatus apsleyi (Mathews). Austral. Av. Rec, Vol. 

 I., p. 33, 1912. Melville Island, Northern Territory. 



No. 181— 5 . Length, 12 inches (25/6/86). 



Irides dark brown, orbital space bluish-white; bill bluish, 

 darker at the tip, cere bluish yellow on the culmen; legs yel- 

 low. 



No. 250— 9 . Length, 13.1 inches (14/7/86). 



Irides fine brown, eyelash brown, orbital space bluish 

 white, the same at the base of the bill; bill bluish-black at 

 the tip, passing into bluish-white at the base, cere pale bluish- 

 white, tinged with greenish-yellow at the top; legs and feet 

 greenish-yellow. 



No. 293— 5 . Length, 11.9 inches (20/7/86). 



No. 347— $ . Length, 13.7 (31/7/86). 



This is often seen long after sunset. 



