AVES FALCONID^. 



619 



shoulders with rusty margins and concealed rusty marks ; the tail hoary 

 grey, with a distinct broad terminal band of a much darker shade, blackish 

 or dusky grey, in front of which are sixteen or more narrow bars of dusky 



Fig. 309. 



Tachytriorchh albicaudatus. Adult male ; detail of foot. Natural size. 



grey ; the throat and breast like the upper parts and the remainder of the 

 lower parts inclining to white, or fulvous white with dark markings, arrows, 

 or bars on most of the feathers. 



Female; young of the year. — Much like the preceding bird, but with the 

 sub-terminal band on the tail clearly defined, the ground-color and a ter- 



