CLASSIFICATION. 



a*. White area on sides of neck 

 clearly defined. ; flanks spotted 

 with brown ; middle of abdomen 

 spotted with light brown . . 



b 4 . Sides of neck mottled ; axillaries 

 pure white ; flanks and middle of 

 abdomen pure white. 



a 5 . Larger ; wing 13*3 inches . . 



6 5 . Smaller; wing 11-95 inches .. 



&"'. Upper-surface nearly uniform ; sides 

 of head mottled ; under tail-coverts 

 smoky-brown 



d". Smaller ; wing not exceeding 9.0 inches. 



c'". Axillaries white, with blackish or dusky 

 tips. 



c 4 . Under tail-coverts white ; flanks 

 white . . 



d 4 . Under tail-coverts and flanks dusky- 

 brown 



Under tail-coverts and flanks 

 blackish ; sides of throat and fore- 

 neck mottled with ashy-brown 

 oars .. .. .. . a .. 



gravis, p. 90 



kuhli, p. 94 

 edwardsi, p. 99 



creatopus, p. 101 



e 4 . 



anglorum, p. 104 

 yelkouanus, p. 107 



opisthomelas, p. 109 



d'". Axillaries entirely white, or with 

 occasional dusky mottlings. 



f 4 . Under tail-coverts sooty-black. 



c 5 . Axillaries white, or white with 

 dusky sub-terminal spots and 

 blackish shaft-lines . . auricularis, p. 112 ; newelli, p. 115 



d 5 . Axillaries dusky-brown, or 

 white, with a certain amount 

 of sooty-brown mottling .. subalaris, p. 117 



g 4 . Under tail-coverts white, with the 

 lateral ones occasionally marked 

 with sooty-brown. 



e 5 . Axillaries dusky-brown. 



XLI 



