87 



*151b. Buteo alhicaudatus exiguus, Chapm., Bull. 

 Am. Mus. N.H., xxxiv., p. 637 (1915). 

 [Barrigon, Col.] 

 Columbian White-tailed Hawk. 



" Notably smaller [wing ^ 388 mm.] ; 

 with the upper parts, particularly the head 

 and sides of the neck, darker and more 

 slaty." 



Llanos of 

 E. Columbia & 

 E. into 

 Venezuela. 



151c. Buteo alhicaudatus colonus Berl., J.f.O. 

 1892, p. 91. [Curasao.] 

 Curagao White-tailed Hawk. 



Ad. plumage not seen ; imm. black, 

 abdomen somewhat barred with buff ; tail 

 with indistinct darker bars. [Tring Mus.] 



Curagao, 

 Bonaire, and 

 Aruba Is. 



Gen. XXXIII. TRIORCHIS Kaup (1829). 



[ = Archibuteo Brehm (1828). (nom. nud.)] 



Type Falco lagopus Gmel. ( = F. lagopus Briinn.). 



With general characters and appearance of Buteo. 

 but tarsi feathered to the toes. 



*fl52. Trior chis lagopus lagopus (Briinn.), Orn. 

 Bor., p. 4 (1764). [Christiansoe, near 

 Bornholm.] 

 Rough-legged Buzzard. 



Wing <S 420-450, ? 440-460 mm. ; above 

 deep brown with paler margins ; head, 

 neck, throat and chest white, streaked with 

 dark brown ; scapulars and least wing- 

 coverts with white bases ; upper tail- 

 coverts banded with white ; tail white, 

 terminal portion ashy, with sub-terminal 

 blackish band ; centre of beUy and flanks 

 deep brown mottled with white ; thighs and 



N. Europe and 

 N. Asia ; in 

 winter S. to 

 Brit. Isles and 

 Mediterranean. 



