6 1 PATAGONIAN EXPEDITIONS : ZOOLOGY. 



Genus HETEROSPIZIAS Sharpe. 



Type. 



Heterospizias, Sharpe, Cat. Bds. Brit. Mus. i. p. 160 



(1874); Hand-list Birds, i. p. 254 (1899) . . . H. meridionalis. 



Spizigeranus, Gray, Hand-list Bds. i. p. 9 (1869, nee 



Kaup) H. meridionalis. 



Spizogeranus, Agassiz (1844) = Spizigeranus. 



Hypomorphnus, Cabanis (1844) H. meridionalis. 



Geographical Range. Northern and central portions of South America ; 



casual in northern Patagonia (C. Burmeister). 



HETEROSPIZIAS MERIDIONALIS (Latham). 



Rufous-headed Falcon, Lath. Gen. Syn. Suppl. p. 33 (1787). 



Falco meridionalis, Lath. Ind. Orn. I. p. 36 (1790). 



Gavilan de estero acanelado, Azara, Apunt. I. p. 72 (1802). 



Circus rufulus, Vieill. N. Diet. d'Hist. Nat. IV. p. 466 (1816). 



Falco rutilans, Licht. Verz. Doubl. p. 60 (1823); Temm. PI. Col. I. pi. 25 



(8124.) 



Aquila buzon, Spix. Av. Bras. I. p. 6 (1824). 



Circus rutilans, Stephens in Shaw's Gen. Zool. XIII. part ii., p. 43 (1825). 

 Buteo rutilans. Less., Man. d'Orn. I. p. 104 (1828); Hartl. Ind. Azara, p. 



i (1847). 



Hypomorphnus rutilans, Cab. Arch. fur. Naturg. 1844, p. 264. 

 Rupornis meridionalis, Kaup, Contr. Orn. 1850, p. 68. 

 Astur rufulus, Strickl. Orn. Syn. p. 422 (1855). 

 Buteogallus meridionalis, Scl. P. Z. S. 1860, p. 288. 

 Asturina rutilans, Burm. La Plata Reise II. p. 436 (1862: Tucuman); C. 



Burm. An. Mus. Nac. Buenos Aires, III. part XI. p. 316 (1890: Rio 



Chico del Chubut, Patagonia). 



Buteo meridionalis, Schl. Mus. Pays. Bas. II., Buteones, p. 17 (1862). 

 Urubitinga meridionalis, Scl. & Salv. P. Z. S. 1867, p. 589, 1869, p. 252, 



p. 634 (Buenos Aires); iid. Nomencl. Av. Neotr. p. 119 (1873); 



Durnf. Ibis, 1880, p. 362 (Salta). 

 Heterospizias meridionalis, Sharpe, Cat. B. Brit. Mus. I. p. 160 (1874); 



Barrows, Auk, I. p. 109 (1884: Entrerios); Scl. & Huds. Argent. Orn. 



II. p. 63 (1899); Sharpe, Hand-list B. I. p. 254 (1899). 



GENERAL DESCRIPTION. 

 Size. Adult male. 



