28. ARCHIBTTTEO. 



195 



2S. ARCHIBUTEO. 



Type. 



Arcbibuteo, Brehm, Im, 1828, p. 12G9 A. lao-opus. 



Triorchis, Kaup, Natilii. Syst. p. 84 (1829) . " ' " A.' la^opus.' 



Butaetes, Less. Traits, p. 83 (1831) A. lagopus' 



Lagopus, Frascr, P. Z. S. 1844, p. 37 '. ". a". ferriigineus. 



Hemiaetus, Hodffs. in Grm/s Zool. Misc. p. 81 (1844) A. strophiatus 



Tarsus of Archibideo lagopus, with feathering parted to show scales. 



Range. The whole of North America and Mexico. All the 

 northern and central portions of Europe, as well as northern Asia 

 generally, not entering the Indian peninsula. 



Keij to the Species. 



a. Flanks and thighs brown. 



a'. Crown of head, throat, and chest white or 



buffy white, streaked with brown lagopiis, p. 196. 



v. Similar to above, but much darker, and 

 having a greater extent of black on lower 



, surface sanctijohminis, p. 107. 



c. Lrown of head, throat, and chest uniform 

 , „, brown sfrophiatus, p. 199. 



b. Flanks white; thighs bright chestnut fawn- 



'"olour ferru;/!„rus, p. Ki9. 



p2 



