67 
*1128a. Heterospizias meridionalis australis Swann, 
Auk, xxxvill., p. 359 (1921) [Laguna de 
Malima, Tucuman, Arg., type in coll. H. 
Karke Swann]. 
Southern Red-winged Hawk. 
Larger ; wing 9 415-417, 2430 mm. ; much 
darker above ; mantle and scapulars black- 
ish brown with rufous margins ; below 
averaging darker, with the black bars more 
pronounced. 
Argentina. 
Gen. XXXI. GERANOAETUS Kaup (1844). 
Type Spizaétus melanoleucus Vieill. 
Size much larger than Luteo ; tail proportionately 
shorter, and wings proportionately longer. 
129. 
129a. 
Geranoactus wmelanoleucus  melanoleucus 
O(Viewl.) N> Dict.d' Hist. Nat:; xxxil., p. 57 
(1819). [Paraguay—ex. Azara.] 
Paraguayan Buzzard-Eagle. 
Wing 3 497, 2541 ; 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 tali coverts barred with blackish. 
Geranoaetus melanoleucus australis, subsp. 
nov. [2 Valle del Lago Blanco, Chubut, 
Patag., Aug. 12, 1901, J. Koslowsky, type 
in bate Mis:, res. m0. 1903,.12, 8, Lr.) 
Patagonian Buzzard-Eagle. 
Size similar; wing ¢ 480-485, 2 531-565 
mm.; above and chest as before; below 
finely barred all over with blackish (lightly 
in oldest birds and more heavily in less 
mature). 
Paraguay, S. 
Brazil (Rio 
Grande), 
Uruguay and 
Buenos Ayres. 
N.W. Argentina -+— 
to Patagonia, 
and Straits of 
Magellan; also 
Southern and 
Central Chile ? 
