Paraguay, Bolivia, and Southern Brazil. 339 



201. Nycticorax tayazu-guira. 

 Nydicorax obscurus Arg. Oni. ii. p. 105. 

 Nycticorax tayazu-yuira 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 llunnacles 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 tlie Rio Parana and llio Paraguay, 

 frequenting the thick bush along the river-banks. 



202. Cancroma cociilearia. 



Cancroma cociilearia 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. 



Fam. Cicomida:. 



203. EUXENURA maguari. 



Euxenura maguari Arg. Ora. ii. p. lOG ; 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-colonrj chin dull orange; legs and toes dull purplish 

 brown. 



