44 TYRANNISE. 



The lessor crost, smaller size, and shorter plumbeous bill serve to 

 distinguish this species from C. comatus. As regards the curious 

 sexual difference of the female cf. Pelzeln, op. cit. 



3. Cnipolegus aterrimus. 



Fluvicola nigerrima, d'Orb. et Lafr. Syn. Av. i. p. 59. 



Ada nigerrima, d'Orb. Voy., Ois. p. 340. 



Cnipolegus aterrimus, Kaup, Journ. f. Orn. 1853, p. 29; Heine, 



J.f. 0. 1859, p. 334 ; Scl. Cat. A. B. p. 202 ; Scl et Salv. Nomencl. 



p. 43. 

 Sericoptila aterrima, Cab. et Hein. Mus. Hein. ii. p. 46. 

 Cnipolegus anthracinus, Tacz. P. Z. S. 1874, p. 533 ; id. Orn. Per. 



ii. p. 208 ( cJ ) P 



Uniform dull black ; a broad bar across the bases of the inner 

 webs of the wing-feathers white ; bill plumbeous ; feet black : whole 

 length 6 inches, wing 3 - 3, tail 2-9. Female. Ashy brown, rump and 

 upper tail-coverts bright rufous ; wings blackish, ends of coverts 

 (forming two bands) and outer margins of secondaries white ; bases 

 of the outer webs of the primaries rufous ; tail, apical portion 

 blackish, basal portion bright rufous, like the tail-coverts : below 

 pale fulvous, whiter on the belly ; bill and feet black. 



Hah. Bolivia. 



n, b. $ 5 ad. sk. Tilotilo, Bolivia {Buckley). Salvin-Godman Coll. 



c, d. 3 $ ad. sk. Tilotilo, Bolivia (Buckley). Sclater Coll. 



e,f. 3 2 a( i' sk. ; Sorata, Bolivia (Buckley). Salvin-Godman Coll. 



g. Jr. sk. 



h. $ ad. sk. Sorata, Bolivia (Buckley). Sclater Coll. 



i. 3 ad. sk. Bolivia (D. Forbes). Sclater Coll. 



/. J ad. sk. Bolivia. Sclater Coll. 



k, I. 3 2 ad. sk. Bolivia (Bridges). Eyton Coll. 



m, n. 2 ad. sk. Bolivia. T. Bridges [C.]. 



o. Ad. st. Bolivia. • T. Bridges [C.]. 



4. Cnipolegus anthracinus. 



Cnipolegus anthracinus, Heine, J. f. 0. 1859, p. 334 ; Scl. et Salv. 



Nomencl. p. 43; Cab. J.f. 0. 1878, p. 197 (Cordova) ; Scl. et Huds. 



Arg. Orn. i. p. 126. 

 Cnipolegus aterrimus, White, P. Z. S. 1882, p. 604 ; Salv. Ibis, 1880, 



p. 356 (Salta). 

 Myiarchus fasciatus, Leybold, J.f. O. 1865, p. 402 ( 2 ) ; cf. Cab. J.f. O. 



1878, p. 197. 

 Cnipolegus cyanirostris, Burm. La-Plata Reise, ii. p. 457. 



