AVES FALCONID>E. 567 



Plialcobtfnus monfanns, D'Orb. Voy. Amcr. Merid. Oiscaux, p. 51, pi. 2 



(1835). 

 Mifaago montamts, Darw. Voy. Beagle, Birds, p. 13 (1841). 



Milvago megahpterus, Danv. /. c. pp. 13, 21 ; Lane, Ibis, 1887, p. 182 



(Sacaya, Cancosa to 6,000 feet). 

 Polyborus megahpterus, Cab. & Tschudi, Faun. Peruana, pp. 16, 78 



(1845). 

 Caracara montanns, Des Murs in Gay's Hist. Chil. Zool. I. p. 210 (1847). 



P/ta/cobanus megahpterus, Bp. Consp. Av. I. p. 13 (1850); Hartl. Naum. 



1853, p. 220 (Chili); Burm. Reisc La Plata, II. p. 434 (1861: 



Tucuman). 

 Milvago crassirostris, Pelz. Sitz. Akad. Wien, xliv, p. 7 (1861); id. Reise 



Novara, V6g. pi. i (1865: Chili). 

 Ibycter megahpterus, Sharpe, Cat. B. Brit. Mus. I. p. 36 (1874); Burm. 



An. Mus. Nac. Buenos Aires, III. part XI, p. 315 (1890: Rio Chico, 



Patagonia); Sfiarpe, Hand-list B. I. p. 244 (1899). 



FIG. 282. 



Ibycter mtgabpttnu. Immature female. P. U. O. C. 7891. Rio Gal legos, Patagonia, 26 May, 

 1896. J. B. Hatcher. About one-sixth natural size. 



GENERAL DESCRIPTION. 



Size. Adult male. 



Total length, about 21.50 inches. 



Wing, 14.5 inches. 



Oilmen, 1.5 inches. 



