66 ROUGH-LEGGED BUZZARD— BLACK HAWK. 



all these sections. I believe it will yet be discovered that its 

 ,nest is built on the ground or in some low bush. 



The genus Archibiitco, of which this species is the only 

 representative in Canada, is distinguished by tarsi densely feath- 

 ered to the toes, but more or less naked and scaly behind ; wings 

 lonCT and wide; toes short, claws moderate. Individuals larg-er 

 than in Biiteo. 



Sp. Char. Ordinary Form. Head above yellowish- white, with reddish-brown stripes ; back, 

 scapulars, and shorter quills, pale ashy, \\'ilh partly concealed transverse bands of white and dark 

 brown, the latter frequently jirevailing on back ; rump dark umber brown ; primaries edged with 

 ashy ; a large space on their inner webs at base white ; under parts white ; throat with dark 

 brown stripes ; breast with larger spots and concealed reddish-brown stripes ; abdomen with 

 numerous narrow bars of brownish-black, most conspicuous on flanks, and tinged with ashy ; tibia; 

 barred transversely with white and dark brown tinged with reddish ; under tail coverts white ; 

 upper tail coverts white at base, tipped with brownish-black ; tail white at base, with a wide sub- 

 terminal band of black, and about two other black bands alternating with light cinereous ; under 

 wing coverts white, with brownish-black spots, and a long patch of asliy-brown on the longer ones. 



Younger. Light umber-brown above, much edged with yellowish and reddish while ; a wide 

 band on abdomen brownish-black ; other under parts yellowish-white, with a few lines and spots of 

 brownish-black ; quills ashy-brown, a large portion of their inner webs white at base, with a sub- 

 terminal band of light umber-brown, tip white ; tibice and tarsi pale reddish-yellow, with stripes 

 and spots of dark-brown. 



Iris pale-brown ; bill slate-color ; cere and feet yellow. 



D.-^RK SlAGE. 

 (Probably tnie Adult.) 



Entire plumage brownish-black (rarely glossy-black) ; forehead, throat, and large partly con. 

 cealed spot on" occiput, white ; tail with one transverse band of white, and irregular markings of 

 the same towards the base ; quills with their inner webs white, conspicuous from below ; head 

 sometimes more or less striped with yellowish-white and reddish-yell«v, and tail sometimes with 

 sevei-al transverse bands of white more or less irregular. Bill blackish ; iris, cere, and feet yellow. 



Length in all stages: ig.oo to 20.00 ; extent, 50.00 to 53-00; wing, 15.0010 17.00; tail, 

 8.00 to 9.00. 



