ri:RF:GRiNE falcon. 161 



The bill is blackish-blue at the tip, pale blue at the 

 base, the cere oil-green, the bare orbital space orange, 

 the irides dark hazel, the feet lemon-yellow, the claws 

 brownish-black. The head, and hind parts and sides 

 of the neck, are greyish-black tinged with blue ; the 

 rest of the upper parts deep bluish-grey, gradually fa- 

 ding into ash-grey behind ; the feathers of the back, 

 wing-coverts, and upper tail-coverts, all more or less 

 distinctly barred with greyish-black. The quills are 

 blackish-brown, their inner webs marked with trans- 

 verse elliptical spots of reddish-white. The tail is 

 marked with about twelve bars of blackish-brown, the 

 last of which is broad, the rest diminishing in size and 

 intensity of tint, the intervals light bluish-grey, the tips 

 brownish-white. The throat and fore neck are white; 

 a broad band of a blackish hue, from the angle of the 

 mouth downwards; the cheeks whitish-grey; the breast 

 white, with longitudinal lines and triangular spots ; the 

 sides ash-grey, longitudinally lined and transversely 

 banded ; the tibial feathers ash-grey^ transversely band- 

 ed, as well as the abdominal feathers and lower tail- 

 coverts. The bars on the feathers of the lower parts 

 vary from two to seven, those on the fore part of the 

 breast having two, on the sides five, some of the lower 

 tail-coverts six, the axillar feathers seven. The lower 

 wing-coverts whitish and transversely barred. 



Length to end of tail 16-L inches, to end of wings 

 16; extent' of wings 36 ; wing from flexure 12^; tail 

 71 ; bill along the back l^, along the edge of lower 

 mandible 1^^ ; tarsus If ; hind toe li«, its claw 1^^^ ; 

 second 1^^^, its claw {§ ; third 2, its claw -^% ; fourth 

 or outer li its claw j%. 



