465 
Paraguay, Bolivia, and Southern Brazil. 
243. ZoNIBYX MODESTUS. 
Eudromias modest a Arg. Orn. ii. p. 171. 
Zonibyx modesta Sharpe, Cat. B. xxiv. p. 238. 
a. $ imm. Luiconia, Ajo. Apr. 29, 1909. 
A common bird throughout the winter months in the Ajo 
district, frequenting the open grass-lands, usually singly. 
244. JEgialitis falklandica. 
JEgialitis falklandica Arg. Orn. ii. p. 172; Sharpe, Cat. 
B. xxiv. p. 295. 
a. S ad. Los Ynglases, Ajo. Nov, 10, 1908. 
b. £ ad. Cape San Antonio. Dec. 17, 1908. 
c. $ young. „ „ „ Dec. 19, 1908. 
d. S young. Tuyu, Ajo. Apr. 11, 1909. 
e. $ young. Los Ynglases, Ajo. Apr. 16, 1909. 
f. g. <$ ad. ,, „ Dec. 15, 1909. 
h. $ ad. „ „ Dec. 15, 1909. 
i. $ young. „ „ Jan. 23, 1910. 
A very common species in the Ajo district, frequenting 
both the coast and inland waters, and being especially 
plentiful on the former. Flocks of several hundreds can be 
observed throughout the winter months. It also breeds 
there, as mentioned by Mr. Ernest Gibson, probably more 
plentifully in the sand-hills along the coast. In habits it 
much resembles the European Ringed Plover, JE. hiaticola. 
245. JEgialitis collaris. 
JEgialitis collaris Arg. Orn. ii. p. 173 ; Sharpe, Cat. B, 
xxiv. p. 288. 
a. $ ad. Monte Alto, Paraguay. Aug. 25, 1909. 
b. $ ad. Desaguadero, „ Aug. 29, 1909. 
c. d. $ ad. Colonia Risso, ,, Sept. 9, 1909. 
e. $ ad. Near Puerto Braga, Paraguay. Sept. 24, 1909, 
A fairly common species on the Parana and Paraguay 
Rivers, especially on the latter, and many pairs were 
observed. On the 10th and 24th of September breeding 
pairs w r ere seen, but I could not find their nests, though the 
birds ran about in a very excited manner within a few feet 
