12. IBYCTER. 35 



Fuego and the Falkland Islands, extending into Central America as 

 far north as Guatemala and Hondiu-as. 



Key to the Species. 



a. Thighs hlack ater, p. 35. 



b. Thighs white. 



a'. Tail black americanus, p. 35. 



v. Tail tipped with white. 



a". Throat and chest black megalopterus, p. 36. 



h". Throat and chest white alhigidark, p. 37. 



c". Throat and chest white, spotted with black . carunciilatus, p. 38. 



c. Thighs bright tawny rufous australis, p. 38. 



d. Thighs ochraceous butf. 



c'. Under surface of body, including under wing- 

 coverts, ochraceous buff chimachima, p. 39. 



d. Under surface of body brownish ochre, with dark 

 brown shaft-stripes ; under wing-coverts dark 

 rufous brown chimango, p. 41. 



1. Ibycter ater. 



Daptrius ater, Vieill. Analyse, p. 22 (1816) ; Vig. Zool. Journ. i. 



p. 336 (1824) ; Vieill. ^- Oud. Gal. Ois. pi. 5 (1825) ; Cab. in Schomb. 



Reis. Guian. iii. p. 742 (1848). 

 Falco aterrimus, Temm. PI. Col i. pis. 37, 342 (1823). 

 Gymnops atenimus, Sjn.v, Av. Bras. i. p. 11 (1824). 

 Cu'caetus aten-imus, Cuv. Regne An. i. p. 328 (1828). 

 Daptrius aterrimus, Less. Man. d'Orn. i. p. 75 (1828). 

 Ibycter ater, Sw. Classif. B. ii. p. 209 (1837) ; Gray, Gen. B. i. p. 9, 



pi. 5. fig. 1 (1844); Bp. Consp. i. p. 12 (1850) ; Strickl. Orn. Syn. 



p. 23 (1855) ; Pelz. Verh. z.-b. Wien, 1862, p. 135 ; Schl. Mus. P.- 



B. Polybori, p. 7 (1862) ; Gurney, Cat. Bapt. B. None. Mus. p. 29 



(1864) ; Pelz. Orn. Bras. pp. 2, 392 (1871) ; Scl. 8,- Salv. Nomencl. 



Av. Neotr. p. 122 (1873). 

 Milvago aten-imus, Burm. TJi. Bras. ii. p. 39 (1856). 



Adult. Entirely black with greenish reflections, excepting a white 

 band across the base of the tail ; cere and sides of face bare and of 

 a red colour. Total length 16-5 inches, culmen 1'45, wing 12-7, 

 tail 8, tarsus 2-05. 



Hah. The whole of the Amazon district, reaching into Ecuador 

 on the west, into British Guiana on the north, and extending along 

 Eastern Brazil as far as 30° S. lat. 



2. Ibycter americanus. 



Aigle d'Amerique, Buff. PL Enl. i. pi. 417. 

 Red-throated Falcon, Lath. Gen. Syn. i. p. 97 (1781). 

 Falco americanus, Bodd. Tabl. PL EnL p. 25 (1783). 

 Falco aquilinus, Gm. S. N. i. p. 280 (1788). 



e2 



