40 FALCONIIiJ;. 



(1869) ; Peh. Orn. Bras. pp. 2, 392 (1871) ; Scl. ^ Salv. Nomencl. 

 Av. Neotr. p. 122 (1873). 

 Ibycter chimacliima, Kaup, Arch. f. Naturg. vol. xvi. p. 41 (1850). 



Young. Above rather rufous brown, with distinct straw-coloured 

 margins to most of the feathers of the back ; the head minutely 

 spotted with straw-colour, and streaked more distinctly with the 

 same on the sides of the crown, especially over the eye, where a 

 distinct eyebrow is formed ; the hind neck more distinctly streaked 

 with straw-colour, the sides of the neck being entirely of the latter 

 colour, some of the feathers with brown margins ; feathers behind 

 the eye and ear-coverts uniform brown, the latter with somewhat of 

 a rufous tint ; fore part of cheeks and chin almost uniform yellowish 

 white ; rest of under surface deep straw-yellow or ochre, the feathers 

 margined with brown on the chest, causing a striped appearance ; the 

 flanks and thigh-feathers spotted on both webs or barred across with 

 brown ; the under tail-coverts uniform straw-yellow ; quills dark 

 brown ; primaries externally whitish at base, freckled with brown ; 

 all the quiUs white at base of inner web, shading into rufous, barred 

 with dark brown, the bars on the primaries narrower ; under wing- 

 coverts rufous-ochre, thickly barred with dark brown ; upper taU- 

 coverts pale buffy cream-colour, ■pith indistinct remains of brown 

 bars ; tail-feathers also cream-coloured, crossed with seven bars of 

 dark brown somewhat washed with rufous ; the tips whitish, pre- 

 ceded by a very broad subterminal band of dark brown. Total 

 length 16 inches, wing 11-2, tarsus 2-05. 



The progress from the young to the adult stage seems to be effected 

 by a gradual change of the feather, the brown on the head, neck, 

 and under parts gradually disappearing, and the cream-coloured 

 centres widening out until they occupy the whole of the feather. 

 The brown bars on the lower part of the tail also diminish in extent 

 and grow narrower. 



Adult. Above brown, Avith pale ashy brown margins to the 

 feathers of the back, scapulars, and wing-coverts ; quills dark sepia- 

 brown ; secondaries of the same colour as the back, aU tipped with 

 whity brown ; primaries white at base of both webs ; head and 

 neck all round (excepting a little streak of brown behind the eye) 

 and entire underparts, including the under wing- and tail-coverts, 

 white ; upper tail-coverts and tail for two thirds of its length white, 

 the latter barred with brown, the middle feathers also somewhat 

 frecklfcd with brown ; the terminal third of the taU blackish brown, 

 forming a broad dark band slightly tipped with white ; feet pale 

 yellow ; bare space round eye tinged with rose-colour ; iris whitish. 

 Total length 16 inches, culmen 1-35, wing 10-5, tail 7'2, tarsus 2. 



Hah. The whole of BrazU north of the Tropic of Capricorn, along 

 the frontiers of Paraguay, not south of 28° S. lat. All Amazonia, 

 extending through Columbia into Panama, 



o. Ad. sk. S. America. 



h. Juv. St. S. America. 



c. Ad. St. Bahia. Sudburv Museum. 



