248 Mr. J. Hancock on the 



lead or mouse colour, barred and spotted with cream colour ; 

 under parts the ground is buff, marked with streaks, heart- 

 shaped spots, and bars of dark mouse colour. Wings reach- 

 ing to within about 1| in. of the end of the tail. 



Iceland falcon. Pen. Arc. Zool., Addenda C, vol. i. p. 252. 

 Greenland falcon. Pen. Arc. Zool., Addenda D, vol. i. p. 257. 

 Collard falcon, Pen. Arc. Zool, vol. i. p. 158. 

 Falco gyrfalco, Tar. Linn., vol. i. p. 158. 

 Iceland falcon. Lath. No. 50. 



Dimensions. Adult male, length 1 ft. 9 in. ; extent of 

 wings 3 ft. 10 in. 



Description. Bill lead colour, gradually darker towards the 

 tip, with two processes in the upper mandible ; irides dark 

 brown ; cere, orbits and feet bright yellow ; crown, occiput, 

 and cheeks cream colour, streaked with dark grey or mouse 

 colour. The feathers of the upper parts dark slate colour, 

 with two or more transverse cream-coloured bars sprinkled 

 with ash, the bars increasing in number as the feathers in- 

 crease in size, each feather with a narrow edging of the same ; 

 primaries several shades darker, with fourteen cream-coloured 

 bars on the inner w T ebs, with a few less conspicuous and 

 broken bars on the outer webs. Tail rounded, consisting of 

 twelve feathers of a dark grey, crossed with twelve or thir- 

 teen bars of cream colour mottled with ash ; throat nearly 

 white ; breast and belly cream colour or buff, the former 

 streaked and the latter marked with heart-shaped spots of the 

 ground colour of the back ; the flanks and under tail coverts 

 transversely barred as in the peregrine, but the bars less nu- 

 merous. 



Dimensions. Adult female, length 1 foot 11 in. \ extent of 

 wings 4 feet 2 in. 



Desc. In every respect like the male, excepting that she is 

 considerably darker. 



Young or nest plumage : bill, cere and legs dark blue; crown 

 of the head and occiput cream colour, streaked with dark 

 brown ; the whole of the upper plumage the same, edged with 

 cream colour, with a few spots of the same on the lower 

 parts of the scapulars and greater wing coverts ; under parts 

 cream colour, marked longitudinally with closely set dark 

 brown blotches, increasing in size on the vent and flanks ; 



