78^ 



«. 2 ad. sk. 

 5. Juv. St. 



c. Ad. St. 



d. x\d. st. 



e. Ad. sk. 



f. Juv. sk. 



g. h. (J ad. sk. 

 i. $ ad. sk. 



i 



4. Micrastur gilvicollis. 



Sparvius gilvicollis, Vieill. JV. Diet. d'Hist. Nat. x. p. 323 (1817) ; 



Pitcher. Rev. et Mag. de Zool. 1850, p. 91. 

 Nisus concentricus, Less. Traite, p. 60 (1831, ex Illigei; MS.) ; Schl 



Mus. P.-B. Astures, p. 51 (1862). 

 Climacocercus concentricus, Cah. in Tsch. Fmm. Peruan. Vog. p. 98 



(1844) ; id. in Scliomb. Reis. Guian. p. 738 (1848) ; Burm. Th. Bras. 



ii. p. 86 (1855). 

 Micrastur concentricus, Gray, Gen. B. p. 28 (1849) ; Bp. Consp. i. 



p. 30 (1850) ; Strickl. Orn. Syn. p. 123 (1850) ; Pelz. Orn. Bras. 



pp. 7, 399 (1871). 

 Herpetotheres concentricus, Kaup, Contr. Orn. 1850, p. 71. 

 Climacocercus gilvicollis, Cab. J. f. 0. 1865, p. 407. 

 Micrastur gilvicoUis, Pek. Reis. Nov. Fog. p. 10 (1865) ; Scl ^ Salv. 



P. Z. S. 1869, p. 368 ; Gray, Hand-l. B. i. p. 31 (1869) ; Pelz. Orn. 



Bras. pp. 7, 399 (1871). 



Adult female. Above blackish, with a very slight shade of brown 

 in some lights, the upper tail-coverts slightly spotted with white 

 near the base ; frontal feathers and cheeks whitish, the hinder 

 margin of ear-coverts blackish, behind this an imperfect ruff, the 

 feathers composing which have white bases ; quills a little browner 

 than the back, barred on inner web with white ; tail black, tipped 

 with white and crossed with four ii-regular white bars ; under sur- 

 face of body white, the throat unspotted, the remainder crossed with 

 numerous wavy lines of blackish brown, with a faint fulvous tinge 

 on upper breast, the bars gradually disappearing towards the abdo- 

 men and under tail-coverts, and very slightly indicated on under 

 wing-coverts. Total length 14-5 inches, culmen 1, wing 7"15, tail 

 7 "3, tarsus 2-45. 



Adult male. Above dull ashy brown, clearer on the head and sides 

 of the face ; quills coloured like the back, a little browner externally, 

 and barred with white on the inner web ; tail blackish, very slightly 

 tipped with white, and crossed with four white bands (three on 

 central tail-feathers) ; under surface of body dull white, the throat 

 entirely of this colour, the breast minutely barred with wavy lines 

 of greyish black, the sides of the upper breast washed with ashy, 

 and the bars gradually decreasing on the abdomen, thighs, and under 

 wing- and tail-coverts. Total length 13-5 inches, wing 6-6, tail 6-5, 

 tarsus 1-2. 



Hah. S. America, from New Granada and the countries south 

 of the Orinoco, throughout the whole of Amazonia to Peru, and 

 through Brazil to a little below 20° S. lat. 



