Paraguay, Bolivia , and Southern Brazil. 345 
This is a very common species in the Ajo district and 
frequents all the open waters and the sea-coast. 
In November 1908; on the Laguna de Milan, many of 
these birds were seen unable to fly, and on being chased half 
swam and half flopped over the surface of the water to take 
refuge in the dense reed-beds. 
214. Dendrocygna fulva. 
Dendrocygna fulva Arg. Ora. ii. p. 126 ; Salvad. Cat. B. 
xxvii. p. 149. 
a. d ad. Villa Pilar, Paraguay. 
Irides brown; bill slate-coloured, darker at tip; legs 
and toes slate-coloured. 
215. Cairina moschata. 
Cairina moschata Arg. Orn. ii. p. 129; Salvad. Cat. B. 
xxvii. p. 51. 
a, b. $ imm. & ad. Pan de Azucar, Brazil. Sept. 18-19, 
1909. 
Commonly observed in Northern Paraguay and Brazil, 
especially near Puerto Maria, in flocks of upwards of forty 
individuals. 
216. Heteronetta atricapilla. 
Heteronetta melanocephala Arg. Orn. ii. p. 130. 
Heteronella atricapilla Salvad. Cat. B. xxvii. p. 325. 
a, b. d $ ad. Los Ynglases, Ajo. Oct. 3, 1908. 
c. $ ad. ,, „ Oct. 27, 1908. 
This is by no means a common Duck in the Ajo district: 
it frequents singly or in pairs open sheets of water in the 
larger reed-beds ; it swims rather low in the water and 
reluctantly takes to flight. 
217. Querquedula cyanoptera. 
Querquedula cyanoptera Arg. Orn. ii. p. 130; Salvad. Cat. 
B. xxvii. p. 303. 
a, b. d ? • Los Ynglases, Ajo. May 9, 1909. 
d • Irides pale yellow ; bill black ; legs and toes pale 
yellow. 
$ . Irides brown ; bill black faintly mottled .with grey, 
lower mandible mottled with pale flesh-colour ; legs and 
toes pale brown. 
