42 MR. E. W. WHITE ON THE [Feb. 6, 



Their usual position was, perched on a tree in early morning and 

 not far from the river. 



24. QxjERaUEDULA FLAVIROSTRIS (Vieill.). 



(S . Cosquin, Cordova, Arg. Rep., June 29, 1882, 



$. „ „ „ June 23, 1882. 



Iris brovrn. 



This Duck flies in flocks of about twenty in winter, nesting during 

 August and September in holes on the clay banks of the river. The 

 nest is formed of a large quantity of down, in which I found six 

 eggs of a dull white colour. Dimensions : axis 54 millim., diam. 40 

 millim. 



25. Dafila spiNiCAtTDA (Vieill.). 



c?. La Plata, Buenos Aires, Arg. Rep., Nov. 9, 1882. 

 Iris dark brown. 



A common Duck, which frequents the lagoons about here in 

 flocks. 



26. Mareca chiloensis (King). 



c?. La Plata, Buenos Aires, Arg. Rep., Nov. 24, 1882. 

 ?. „ „, „ Nov. 4, 1882. 



Iris dark brown. 

 Common in flocks about lagoons. 



27. Rallus rhytirhynchus (Vieill.). 



cJ . Cosquin, Cordova, Arg. Rep., July 4, 1882. 



Iris crimson. 



An uncommon bird here, mei with usually along the irrigation 

 canals. Upper base of beak pale sky-blue, with a patch of crimson 

 beneath, the rest of the beak deep green ; legs crimson. 



28. FuLiCA LEUCOPTERA (Vieill.). 



cJ . Cosquin, Cordova, Arg. Rep., June 16, 1882. 

 Iris crimson. 



At Cosquin these birds are rare, and are only met with in the 

 swamps that occur in the low ground in the vicinity of the river. 



29. Tringa fuscicollis, Vieill. 



cJ. La Plata, Buenos Aires, Arg. Rep., Nov, 3, 1882. 

 Iris brown. 



Found abundantly in flocks on the edges of the lagoons, some- 

 times intermingled with flocks of T. dorsalis. 



30. LiMOSA hubsonica (Lath.). 



(S . La Plata, Buenos Aires, Arg. Rep., Nov. 10, 1882. 



2. „ „ „ Nov. 10. 1882. 



Iris dark sepia. 



Frequents the lagoons in flocks of about thirty. 



