Birds of Paraguay. 73 



This young bird has five black bands on the tail, whereas 

 there are only four in the adult bird. The upper tail-coverts 

 are white in the young with black bars or heart-shaped spots, 

 but in the old bird the upper tail-coverts are sandy buff 

 with rufous bars. 



The under surface is very different from that of the adult, 

 the throat and chest being white with longitudinal brown 

 centres to the feathers, the entire breast and abdomen also 

 white, transversely barred with brown (these bars less distinct 

 on the lower abdomen and reduced to small terminal spots 

 on the under tail-coverts), and the thighs slightly more sandy 

 buff and somewhat closely barred with brown. 



The old bird is altogether more rufous below, the throat 

 being blackish with a few streaks of sandy buff, the feathers 

 of the fore-neck and chest pale ferruginous with blackish 

 shaft-lines and sandy-buff edges to the feathers, the breast 

 and abdomen regularly barred with pale ferruginous on a 

 sandy-buff ground, the bars rather narrower on the lower 

 flanks and abdomen and reduced to narrow and incomplete 

 heart-shaped or V-shaped bars on the under tail-coverts ; the 

 thighs brighter sandy rufous, with dull ferruginous bars, not 

 very distinct, while this colour of the thighs stands out in 

 contrast to the pale colour of the abdomen. 



Mr. Bertoni has separated this bird under the name of 

 Puta/nolegas superciliaris, var. furvicollis (cf. Bertoni, /. c. 

 p. 161), but according to Dr. Ihering and Mr. C. W. Rich- 

 mond it is inseparable from Rupornis pucker ani. 



28. Urubitinga urubitinga. 



Brazilian Eagle Lath. Gen. Syn. i. p. 41 (1781: Brazil). 



Falco urubitinga Gm. Syst. Nat. i. p. 265 (1788, ex Lath.). 



Gavilan mixto chorreado Azara, Apuut. i. p. 88. no. xvii., 

 juv. (1802). 



Gavilan mixto pintado Azara, t. c. p. 92. no. xviii., 

 juv. 



Gavilan mixto negro Azara, t. c. p. 96. no. xx., adult. 



Urubitinga zonura Sharpe, Cat. B. Brit. Mus. i. p. 213 

 (1874). 



