634 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



Fig. 321. 



BiitiO poliosonia. Foot of adult male. Natural size. 



BUTEO ERYTHRONOTUS (King). 



Haliaetiis erythronotiis, King, Zool. Journ. III. p. 424 (1827 : Port Famine). 



Aqttila braccata, Meyen, Beitr. p. 65 (1834). 



Buteo tricolor, D'Orb. Voy. Amer. Merid. p. 106, pi. 3, figs, i, 2 (1835: 



Rio Negro and coast of Patagonia); id. et Lafr. Syn. Av. p. 6 (1838) ; 



Burm. Reise La Plata, II. p. 436 (1861: Mendoza : Tucuman); C. 



