160 PALOONID^. 



feathers narrowly but distinctly streaked with black, obsolete on the 

 thighs and under tail-coverts ; under wing-coverts rufous, streaked 

 with black, those on the edge of the wing more broadly marked. 

 Total length 20 inches, cidmen 1-4, wing 14-5, tail 9-5, tarsus 3. 



Adidt female. Similar to the male and a very little larger. Total 

 length 20 inches, wing 14-S, tarsus 3. 



Hub. The same as that of the genus. 



a. Ad. sk, Australia. Linnean Society [P.]. Type of 



H. caleyi. 



b. Ad. St. Port Essington. Capt. Chambers, K.N. [P.]. 



c. Ad. St. Bourke, River Darling. John Gould, Esq. 



d. Skeleton. Zoological Society. 



25*. HETEEOSPIZIAS*. 



Urubitinga, mtet. aliq. 



Spizigeranus, Gray, Hand-l. B. i. p. 9 (1869, nee Kaup). 



Nostril of H. meridionalis, showing tubercular process. 



Range. The northern and central portions of the South American 

 continent from Columbia and Guiana southwards to 20° S. lat., 

 ranging on the east coast to the provinces of Eio and Paraguay. 



1. Heterospizias meridionalis. 



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



Falco meridionalis. Lath. Ind. Orn. i. p. 36 (1790). 



Gavilan de estero Acanelada, Azara, Aptint. i. p. 72 (1802) ; Ilartl. 



hid. Azara, p. 1 (1847). 

 Circus rufulus, VieUl. N. Diet. iv. p. 466 (1816). 

 Falco rutilans, LicM. Verz. DouU. p. 60 (1823) ; Temm. PI. Col. i. 



pi. 25 (1824). 

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

 Circus rutilans, Stepli. Gen. Zool. xiii. p. 43 (1820). 

 Buteo rutilans, Less. Man. d'Orn. i. p. 104 (1828). 

 Hypomoi-phnus rutilans, Cab. Arch. f. Natiirg. 1844, p. 264 ; id. 8f 



Tschudi, Faun. Peruan. pp. 17, 84 (1844). 

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

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

 Asturina rutilans, Burm. Th. Bras. ii. p. 80 (1856). 

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

 Buteo meridionalis, Schl. Mus. P.-B. Buteones, p. 17 (1862) ; Gray, 



Hatid-l. B. i. p. 9 (1869) ; Schl. Mm. P.-B. Reme Accipitr. p. 110 



(1873). 

 Urubitinga meridionalis, Scl. Sf Salv. P. Z. S. 1867, p. 589, et 1869, 



* erepos, alter ; (TTri^ias, accipiter. 



