FALCON. 71 



five dusky bands ; rump and vent white, with a few dusky spots ; 

 shins feathered, testaceous in colour, with black markings ; legs 

 yellow. 



Inhabits Possega, in Sclavonia ; is most probably not far differ- 

 ing from the rough-legged Eagle, as that bird varies much from 

 age or sex. 



20.— JERFALCON. 



Falco gyrfalco, Ind. Orii. i. 32. Lin. Syst. i, 130. Fn. Succ. No. 64. Gm. Lin. i. 



275. Klein. Jv. p. 48. Datid. Oru. u. 99. Bechst. Deiitsck, ii. 308. Shaw's 



Zool. vli. p. 120. 

 Gyrfalco islandus, Brw. i. 373. A. t. 31. Id. Svo. 108. Brun.9. Muller., No. 73. 



Tern. Man. ii. p. 19. 

 Gerfault, Buf. i. 239. pi. 13. pi. enl. 210. 

 Brown Jerfalcon, Gen. Si/n. i. p. 82. 

 Iceland Falcon, Gen. St/ii. i. p. 71. B. parag. 2d. 

 Arctic Falcon, Gen. Si/n. i. p. 70. 49. var. L. 



MUCH confusion has arisen in respect to this species, from 

 its great variation in plumage. The most natural state appears 

 to be nearly this: length 22|^in. bill bluish ash-colour; cere the 

 same ; irides yellow ; head brown, tlie feathers edged with rufous 

 white ; the rest of the feathers, on the upper part of the body, 

 brown, each edged on the sides with whitish spots; rump and tail 

 coverts striped across with grey ; throat dirty rufous white ; fore part 

 of the neck the same, dashed down the shafts with brown ; breast, 

 belly, and under wing coverts white, marked with dusky spots ; 

 sides, thighs, and under tail coverts barred dusky and white ; quills 



