250 FALCON. 



191— WHIIT^-NECKED EAGLE. 



Falco albicollis, Tnd. Orn. i. 36. Daud. ii. 112, 

 Falco picatus, Shaiv's Zool. vii. 167. 

 White-necked Falcon, Gen. Spi. Sup. p. 30. 



LENGTH 22in. Bill black; head, neck, back between the 

 wings, and all beneath white ; the shafts of the feathers of the head, 

 and hind part of the neck, marked Avith lozenge-shaped, narrow 

 spots of black ; wing coverts black, the ends white, appearing as 

 spots ; quills black half-way from the base, marked on the inner 

 webs with a large patch of white ; secondaries tipped with white ; 

 base of the tail, for two inches and a half, white, then black for 

 four inches, and ultimately white for an inch and a half; shape 

 nearly even, or a trifle hollowed in the middle, and the quills reacli 

 to within one inch of the end of it; legs stout, yellow, feathered 

 below the knee ; claws black. 



Inhabits Cayenne. 



A . — Length 18 inches . Bill yellowish-white ; cere dusky yellow ; 

 point hooked, with a slight notch near the end ; general colour of 

 the head, neck, under wing coverts, and under parts in general, 

 rufous white, or bufl-colour, with obscure streaks of bufl' on the 

 crown and nape ; inner ridge of the wing rufous white ; round the 

 eye scarcely covered with feathers ; behind the eye, from the upper 

 part, a black, narrow, curved streak, more than an inch long ; 

 back and wings deep brown ; the greater quills rufous white half- 

 way from the base, speckled %vith brown on the outer margin ; upper 



