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. S 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, 
Bevista 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.~\ 
