606 Mr. Charles Chubb on the 



surface, the sides of face and ear-coverts are pure grey, the 

 top of the head exhibits a certain amount of grey more or 

 less mixed with olive-brown. 



171. Pachyrhamphus atricapillus. 



Lanius atricapillus Gm. Syst. Nat. i. p. 302 (1788 : 

 Surinam). 



Pachyrhamphus atricapillus Sclater, Cat. B. Brit. Mus. 

 xiv. p. 347. 



a. $ imm. Sapucay, March 15, 1904. 



Bill black, white at extreme tip ; tarsi and feet slate- 

 coloured ; iris brown. 



I consider this specimen to be a young male in first 

 plumage, as the measurements agree with those of the adult 

 of that sex, but the general appearance is more like that of 

 the adult female. 



172. Casiornis rufus. 



Batara roxo Azara, Apunt. ii. p. 212. no. ccxviii. 

 (1805). 



Thamnophilus rufus Vieill. N. Diet. d'Hist. Nat. iii. p. 316 

 (1816 : Paraguay). 



? Muscicapa rubra Vieill. N. Diet. d'Hist. Nat. xxi. p. 457 

 (1818: Paraguay). 



Casiornis rubra (Vieill.) ; Berlepsch, J. f. O. 1887, p. 119 

 (Paraguay) ; Sclater, Cat. B. Brit. Mus. xiv. p. 365 ; Ihering, 

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



Casiornis rufa rufa Hellmayr, Nov. Zool. xv. p. 56 

 (1909). 



a. $ ad. Sapucay, May 9, 1902. 



Bill pinky cream-coloured at base of upper and lower 

 mandibles, black at tip ; tarsi and feet very dark slate- 

 coloured; iris brown. 



b. <$ ad. ; c. ? imm. Sapucay, March 1904. 

 d. ? ad. Sapucay, September 3, 1904. 



[This species is resident and common throughout Para- 

 guay. The borders of woods and even open lands form its 

 hunting-ground. — W. F.~\ 



