339 
Paraguay, Bolivia , and Southern Brazil. 
201. NYCTICORAX TAYAZU-GUIRA. 
Nycticorax obscurus Arg. Orn. ii. p. 105. 
Nycticorax tayazu-guira Sharpe, Cat. B. xxvi. p. 155. 
This Night-Heron is not represented in the collection 
made by me; but there is an adult male in the collection 
of Miss Bunnacles taken at Los Ynglases, Ajo, on the 
17tli October, 1909. I saw very few Night-Herons in the 
Ajo district, owing principally to the drought; they frequent 
the densest reed-beds, and on being disturbed utter a hoarse 
cry of “ gua-gua.” The bird is locally known as the “ Perro 
de Agua^ (water-dog), I presume from its cry. 
It is very common on the Bio Parana and Bio Paraguay, 
frequenting the thick bush along the river-banks. 
202. Cancroma cochlearia. 
Cancroma cochlearia Sharpe, Cat. B. xxvi. p. 163. 
a, b. <$ ad. Pasage de Bugre, Brazil. Sept. 29, 1909. 
Irides dark brown, eyelids sooty-black above, greenish 
yellow below ; bill, upper mandible black-horn-coloured, 
depression of nostril and cutting-edge dull yellow ; lower 
dull yellow, black at base, skin below dull yellow ; lores 
sooty ; legs and toes dull yellow. 
Both specimens are moulting slightly, and neither has 
the nuchal crest very long. 
Pam. CicoNiiDiE. 
203. Euxenura maguari. 
Euxenura maguari Arg. Orn. ii. p. 106 ; Sharpe, Cat. B. 
xxvi. p. 297. 
a . $ young. Luiconia, Ajo. Jan. 29, 1909. 
b. $ ad. Tuyu, „ Feb. 12, 1909. 
c. d. $ ad. Los Ynglases, Ajo. Mar. 16, 1909. 
e. $ ad. Tebicuari, Paraguay. Aug. 7, 1909. 
The young bird is moulting and assuming the adult 
plumage. The adults taken in February and March are 
moulting slightly. 
Irides brown; lores sooty; bill black with lighter patches 
of horn-colour, chin dull orange; legs and toes dull purplish 
brown. 
