336 Mr. C. H. B. Grant on Birds collected in Argentina, 
Fam. Plotim. 
194. Plotus anhtnga. 
Plotus anhinga Grant, Cat. B. xxvi. p. 419. 
a. $ ad. Tebicuari, Paraguay. Aug. 8, 1909. 
b. $ juv. Mortero, ,, Aug. 13, 1909. 
The adult is moulting on the under parts and tail. 
Ad. Irides brown ; orbit, lores, and bill pale yellowish ; 
upper mandible horn-coloured; legs and toes dirty yellow, 
webs darker. 
Young . Irides yellow ; orbits and bill greenish yellow; 
legs and toes yellowish and sooty. 
The Darter was commonly observed on the Bio Paraguay, 
and the further north we went the more plentiful it became ; 
it was observed also on the Bio Parana to the south of 
Corrientes; the last examples, three together on the 15th of 
November, were seen a few miles below La Paz, Northern 
Argentine. 
Fam. Ardeid^e. 
195. Ardea cocoi. 
Ardea cocoi Arg. Orn. ii. p. 93 ; Sharpe, Cat. B. xxvi. 
p. 72. 
a. $ imm. Tuyu, Ajo. Feb. 12, 1909. In full moult. 
Irides pale yellow ; orbits and lores green, surrounded 
with black; bill and upper mandible black, lower pale 
yellow, greenish at base; legs and toes dull black, whitish 
on tibia. 
196. Ardea egretta. 
Ardea egretta Arg. Orn. ii. p. 98. 
Herodias egretta Sharpe, Cat. B. xxvi. p. 95. 
This species is not represented in the collections made by 
me, but I have an adult female in breeding-dress from the 
collection of Miss Bunnacles, shot on November 8th, 1909, 
at Los Ynglases, Ajo. 
Sparingly observed on the river expedition, and everywhere 
very wild. 
