Birds of Paraguay. 595 



Blacicus pileatus, Oberholser, op. cit. xxv. p. 135 (1902 : 

 Sapucay). 



a. $ ad. Sapucay, April 27, 1901. 



b, c. <J; d. ? ad. Sapucay, July 5-30, IDOL 

 e,f- S; ff,h. ? ad. „ August 4-30, 1904. 



c? . Bill black above, creamy buff below; feet black. 



These examples are paler iu colour both above and below, 

 and thus differ from M. cinereus in being dark ashy grey on 

 the upper surface tinged with olive instead of blackish 

 grey ; the head is sooty brown, not black, the colour not so 

 sharply defined as in M. cinereus. Under surface ashy grey, 

 washed with yellow on the abdomen, instead of dusky grey. 

 Total length 5'6 inches, culmen 0"6, wing 29, tail 25, 

 tarsus 055. 



156. Myiarchus ferox. 



Muscicapa ferox Gm. Syst. Nat. i. p. 93i (1788: 

 Cayenne). 



Suiriri pardo amarillo mayor Azara, Apunt. ii. p. 140. 

 no. exciv. (1805). 



Myiarchus ferox Sclater, Cat. B. Brit. Mus. xiv. p. 253 ; 

 Kerr, Ibis, 1892, p. 130 (Lower Pilcomayo) ; Ihering, 

 Revista Mus. Paulista, vi. p. 326 (Paraguay). 



Myiarchus cantans Pelz. ; Berlepsch, J. f. O. 1887, p. 118 

 (Paraguay). 



a. (J ad. Sapucay, October 18, 1902. 



b-e. S ad. „ November 6-27, 1902. 



/. $ ad. „ December 8, 1902. 



g-k. cJ ? ad. et imm. Sapucay, April 7, 8, 1903. 



/, m, n. $; o. Ad. Ybitimi, February 7, 9, 1904. 

 p, q. (J ? ad. Sapucay, February 16, 1904. 



r. (J ad. Sapucay, March 5, 1904. 



Bill dark horn-coloured ; feet black ; iris brown. 



s. $ ad. Sapucay, October 9, 1904. 



[This bird is resident and common. The nests differ 

 considerably : one may be made only of fine roots and 

 grass, whilst another may be constructed with short 

 hairs from animals. In the bottom of the nest are 



