Birds of Paraguay. 595 
Blaeicus pileatus, Oberholser, op. cit. xxv. p. 135 (1902 : 
Sapucay). 
a. B ad. Sapucay, April 27, 1904. 
b, c. d. ? ad. Sapucay, July 5-30, 1904. 
e,f. S’, g, h. $ ad. „ August 4-30, 1904. 
£ . Bill black above, creamy buff below; feet black. 
These examples are paler in 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 2*9, tail 2*5, 
tarsus 0*55. 
156. Myiarchus ferox. 
Muscicapa ferox Gm. Syst. Nat. i. p. 934 (1788: 
Cayenne). 
Suiriri pardo amarillo mayor Azara, Apunt. ii. p. 140. 
no. cxciv. (1805). 
Myiarchus ferox Sclater, Cat. B. Brit. Mus. xiv. p. 253; 
Kerr, Ibis, 1892, p. 130 (Lower Pilcomayo); Ihering, 
Bevista Mus. Paulista, vi. p. 326 (Paraguay). 
Myiarchus cantans Pelz.; Berlepsch, J. f. O. 1887, p. 118 
(Paraguay). 
a. $ ad. Sapucay, October 18, 1902. 
b-e. d a d. ,, November 6-27, 1902. 
/. 2 ad. „ December 8, 1902. 
g-k. S ? ad. et imm. Sapucay, April 7, 8, 1903. 
/, m,n. $; o. Ad. Ybitimi, February 7, 9, 1904. 
p, q. S ? ad- Sapucay, February 16, 1904. 
r. £ ad. Sapucay, March 5, 1904. 
Bill dark horn-coloured ; feet black; iris brown. 
s. 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 
