AVES FALCONID^. 593 



Head : Forehead inclined to whitish, which becomes definite in the loral 

 region ; the white of the loral region thickly covered with fine black hairs 

 recurved backward. Remainder of the head ashy blue, with a faint whitish 

 eyebrow-stripe, outlined externally with a narrow hair-line of black. A 

 pronounced facial disk, or ruff, back of the ear-coverts, slaty blue in color. 



Neck : Concolor with head ; the shade of ashy blue varies somewhat 

 and is lightest on the throat and on the ruffs back of the ear. 



Back : Concolor with the head and hind neck ; the upper tail-coverts 

 white, forming a conspicuous patch ; the upper tail-coverts have in some 

 cases a sub-terminal bar of ashy blue. 



Tail : From above when closed, appears to be frosted ashy blue, with a 

 white terminal and a broader subterminal band of dark brown, almost black, 

 heavily frosted with ashy blue. When spread, the two central rectrices 

 alone are seen to be ashy blue with the marks described ; the other rec- 

 trices have only part of the outer webs ashy blue, and that portion of the 

 inner webs which is exposed when the tail is spread is the same color; 

 the white terminal bar is present, as is the dark subterminal band. The 

 rest of each tail-feather, both on the inner and outer webs, is white, more 

 or less notched or barred and somewhat suffused with dusky and slaty 

 blue. From below, the tail appears white, with a more or less perfect sub- 

 terminal band of deep ash and bars or conspicuous notches, at least four 

 in number, on the inner web of each feather. 



Wing: The primaries are blackish, frosted on the exterior webs with 

 ashy blue, concolor with the back ; the concealed bases of these feathers 

 are white on both webs, that color giving way to blackish on the outer 

 webs almost at once, but pervading the inner webs for at least half the 

 length of each quill ; the shafts are black. The secondaries are more defi- 

 nitely ashy blue than the primaries, that color appearing on both webs, 

 but white encroaches on the inner webs almost to the exclusion of the ashy 

 blue and each feather has a broad subterminal band of blackish brown and 

 is narrowly tipped with white. The rest of the wing, from above, is con- 

 color with the back. White plumules show at the bend of the closed wing. 



Lower parts : The chin and throat ashy blue, lighter in shade than is 

 that color on the head ; the breast ashy blue, evenly barred with white ; 

 this ends abruptly on the chest, where the feathers are barred evenly deep 

 cinnamon and white, there being six to seven cinnamon bars crossing each 

 feather ; this pattern and color pervades the rest of the lower parts, the 



