792 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



chirping, but has no song. It is a very lively little bird; and when, fly- 

 ing, it displays the white bars on its wings it has a strange and pretty 

 appearance." (P. Z. S. 1872, pp. 541-542.) 



Genus KNIPOLEGUS Boie. 



Type. 



KnipoIeg2(s^d\t, Isis, 1826, p. 973 C. comatus. 



Geographical Range. — South America east of the Cordillera from the 

 mouth of the Orinoco to northern and central Patagonia. 



Knipolegus aterrimus aterrimus Kaup. 



Cnipolegus aterrimus Kaup, J. F. O. 1853, p. 29 (Yungas, Bolivia). 



Descriptioji. — Adult male, 284343, Biol. Survey Colin., U. S. Dept. of 

 Agriculture, General Roca, Rio Negro, Argentina, November 29, 1920, 

 Alexander Wetmore. Total length, 6.10 inches; wing, 3.90; culmen, 

 .50; tail, 3.00; tarsus, .90. Exactly like Phccotriccus hudsoii &xct^\. in 

 measurements. 



Young male, Biol. Survey Colin. 285188, Tapia, Tucuman, Argentina, 

 Alexander Wetmore, April 11, 1921. Buffy brown above, becoming gray- 

 ish on the head and chestnut on the rump ; wings black with very broad 

 and prominent edgings, those of the coverts forming two wing bands, tail 

 mainly tawny chestnut with a terminal band about an inch in width, black ; 

 this does not however involve the outer web of the outermost feathers, un- 

 der parts ochraceous buff, darkest on the breast, lores buffy, bill and feet 

 blackish. The female is similar to the young male. 



Geographical Range. — Bolivia to Argentina and northern Patagonia 

 (General Roca, Rio Negro, Wetmore, the only record for Patagonia). 



Knipolegus anthracinus Heine. 



Cnipolegus anthracimts Heine, Jour. f. Ornith., 1859, p. 334 (Bolivia). 



Similar to K. aterrimus but larger, with the white bar across the under 

 side of the wing broader. 



Geographical Range. — Argentina south to northern Rio Negro, Pata- 

 gonia (Doering). 



