67 



*tl28a. Heterospizias meridionalis australis Swann, Argentina. 

 Auk, xxxviii., p. 359 (1921) [Laguna de 

 Malima, Tucuman, Arg., type in coll. H. 

 Kirke Swann]. 

 Southern Red-winged Hawk. 



Larger ; wing <J 415-417, ? 430 mm. ; much 

 darker above ; mantle and scapulars black- 

 ish brown with rufous margins ; below 

 averaging darker, with the black bars more 

 pronounced. 



Gen. XXXI. GERANOAETUS Kaup (1844). 

 Type Spizaetus melanoleucus Vieill. 



Size much larger than Buteo ; tail proportionately 

 shorter, and wings proportionately longer. 



129. Geranoaetus melanoleucus melanoleucus 

 (Vieill.), N. Diet, d'ffist. Nat., xxxii., p. 57 

 (1819). [Paraguay — ex. Azara.] 

 Paraguayan Buzzard-Eagle. 



Wing <S 497, ? 541 ; above and chest dusky- 

 slate (oldest) to black (less mature) ; wing 

 coverts grey, finely barred with blackish 

 brown ; tail uniform black ; below snowy 

 white, outer under wing coverts and longer 

 under tail coverts barred with blackish. 



Paraguay, S. 

 Brazil (Rio 

 Grande), 

 Uruguay and 

 Buenos Ayres. 



129a. Geranoaetus melanoleucus australis, subsp. 

 nov. [? Valle del Lago Blanco, Chubut, 

 Patag., Aug. 12, 1901, J. Koslowsky, type 

 in Brit. Mus., reg. no. 1903, 12, 8, 115.] 

 Patagonian Buzzard-Eagle. 



Size similar ; wing c? 480-485, ? 531-565 

 mm. ; above and chest as before ; below 

 finely barred all over with blackish (lightly 

 in oldest birds and more heavily in less 

 mature). 



N.W. Argentina 

 to Patagonia, 

 and Straits of 

 Magellan ; also 

 Southern and 

 Central Chile ? 



