Estancia Espartilla, Argentine Republic. 201 



is very slight, being composed of a few roots and twigs firmly- 

 interwoven and lined with a little hay. The young of this 

 species have not a yellow crest. [Cf. Ibis, 1890, p. 4-2G.) 



i-42. MiLVULUs TYRANNUs (Linn.). 



Very common from October to March, although many old 

 birds migrate north iu February. The young do not assume 

 the bright crest until after the first moult. Breeds late in 

 November. Eggs five in number. Greatly harassed in its 

 nesting by Molothrus honariensis. The native name is 

 " Tijereta.'"' 



43. Geositta cunicularia (Vieill.). 



Common throughout the year in pairs. Breeds early in 

 November. Eggs five in number. Native name " Minera.^^ 



44. FURNARIUS RUFUS (Gm.). 



Very common all through the year, never flocking in the 

 winter. Breeds early in October. Eggs four to six in 

 number. One nest I found curiously suspended from a thick 

 branch, the upper mud-work of the nest enclosing tiie bough ; 

 otherwise the nest was similar to others of this species. 

 The native name is "^ Ornero.^' 



45. CiNCLODEs Fuscus (VicilL). 



Fairly common from April to August in pairs amongst the 

 vegetation around the lagoons. 



46. Phl(eocryptes melanops (Vieill.). 



Very common from August to February, departing for 

 the winter months. Breeds in the middle of October among 

 the rushes. Eggs three in number. 



47. Leptasthenura ^githaloides (Kittl.) . 



Common throughout the year in the montes, flocking in 

 small numbers during the winter. Breeds late iu October, 

 in disused Oven-birds^ nests, making a nest of feathers and 

 wool, sometimes lined with a little dry grass. Eggs three in 

 number, of a dull white, very blunt in shape. (C/. Ibis, 

 1890, p. 426.) 



48. Synallaxis hudsoni, Scl. 



Very common throughout the year, living in the paja- 



