Birds of Lomas de Zamora. 463 



6. PoospizA NiGRO-RUFA (d'Orb. et Lafr.). 



Fairly common in woods and such places, where there is 

 much undergrowth. The Na2)uidary {Acacia bonariensis) , for 

 instance, is a favourite resort of the bird. I have never 

 known it breed here. 



7. DoNACOsPizA ALBiFRONs (Vieill.) . 



Not common, but breeds here. I have taken the nest on 

 several occasions. 



8. Embernagra platensis (Gm.). 

 Plentiful. I have never known it nest here. 



9. Embernagra olivascens (d'Orb. et Lafr.). 

 Common in the vicinity of lagunas and arroyos (creeks), 



where it may be seen seated on some post of a wire fence or 

 aquatic plant, feeding on a species of mollusk which appears 

 to be its chief food. It does not breed here. 



10. MoLOTHRUS bonariensis (Gm,). 



Very common. A downright parasite ; it does not seem 

 specially partial to any particular kind of bird. I have 

 taken eggs from nests of species of Furnarius, Anumbius, 

 Troglodytes, Mimus, Milvulus, Zonotrichia, and from those of 

 several other species, 



--^ 11. Agel^us thilius (MoL). 



Fairly abundant. Breeds in the reed-covered lagunas, 

 and lays three white eggs spotted with black, 



12. Agel^us flavus (Gm.). 



[A pair of this species. — P. L. S.] 



^ 13. Leistes superciliaris, Bp. 



[A young bird of this species, apparently not distinguished 

 from Trupialis defilippii. — P. L. S.] 



-W<14. Amblyrhamphus holosericeus. 



[A single adult of this species, from " an aviary.^' — 

 P.L.S.] 



15. Pseudoleistes virescens (Vieill.). 

 Abundant : seen in large flocks feeding in the open 

 camps. In some districts it frequents fields of green maize 

 SER. v. VOL. vj. 2 k 



