328 Mr. C. H. B. Grant on Birds collected in Argentina , 
This species was commonly observed throughout the river 
expedition, usually in parties of six or eight individuals, 
screaming their loudest as they passed over the trees. 
171. PlONUS MAXIMILIANI. 
Fionas maximiliani Arg. Orn. ii. p. 217 ; Salvad. Cat. B. 
xx. p. 327. 
a. d ad. Tebicuari, Paraguay. Aug. 8, 1909. 
b. $ ad. Santa Rosa, Paraguay. Aug. 14, 1909. 
c. $ ad. Siete Puntas, Paraguay. Aug. 31, 1909. 
Irides brown, orbit primrose-yellow; bill dark yellow; 
cere and culmen sooty ; legs and toes sooty. 
All the specimens are in winter plumage, the male from 
Tebicuari having a strong wash of lilac on the throat-feathers 
and being rather bigger. The other two have only a faint 
trace of the lilac, and in both the base of the lower mandible 
is dusky. 
Very few individuals of this Parrot were observed ; in 
flying it resembles an Amazona, but looks smaller and darker, 
and has a different call-note. It was also observed in 
Brazil. 
Earn. Strigida2. 
172. Asio BRACHYOTUS. 
Asio brachyotus Arg. Orn. ii. p. 49. 
Asio accipitrinus Sharpe, Cat. B. ii. p. 234. 
a. S young. Los Ynglases, Ajo. Mar. 20, 1909. 
b. $ ad. ,, „ Jan. 23, 1910. 
The March specimen is apparently young, as it is much 
richer in colour than the January bird. 
This Owl was fairly common in all the rougher grass¬ 
lands, where it was flushed from the ground, and two that 
I put up left the remains of a half-eaten “ Tuco tuco ” 
{Ctenomys) behind them. It breeds in this district, the 
nest being a mere flattened place under a tuft of grass. 
I brought home three eggs, and there is a clutch of two 
in Miss Runnacles , collection, taken on the 28th of January 
