196 Mr. A. H. Holland on the Birds of the 



at its inmost point. Tlie eggs are six in number. It breeds 

 at the end of October. 



10. Tachycineta meyeni, Bp. ; Holland, Ibis^ 1891, p. 16. 

 This Martin is the commonest of the family here, arriving 



late in July and departing in April, although many remain 

 with us all the year round, retiring on the coldest nights 

 to the long paja- grass, from which one rouses them as one 

 rides along. In the daytime these birds hawk around -travel- 

 lers, catching the nimiberless insects roused by them. The nest 

 is placed in Oven-birds' nests, holes in trees, spouts, and 

 under eaves ; it is composed of a little straw, thickly lined 

 with numberless soft feathers. The eggs are six in number_, 

 white and rather blunt. It breeds in the middle of October. 



11. Tanagiia bonariensis, Gm. ; Holland, Ibis, 1891, 

 p. 17. 



Arrives here in great numbers in May, but departs in 

 September, although a few immature males remain until the 

 end of October. Its native name is " Siete Colores." 



12. Pkocnias tersa (Linn.) ; Holland, Ibis, 1891, p. 16. 

 The single female mentioned in my former paper is the 



only specimen of this species I have ever seen here. It was 

 feeding on the berries of the Ligustrum tree. The specimen 

 is now in the British Museum. 



13. Spermophila c.^rulescens (Vieill.). 



Arrives here in August and departs in March. The nest 

 is cup-shaped, very strongly made of horse-hair and rootlets^ 

 without any lining, so that one can see through the bottom. 

 It is firmly fastened to branches, not resting in a fork. The 

 eggs are three in number, white, slightly spotted with purple, 

 greatly blotched at the larger end with dark brown, and 

 slightly so all over. The bird, which is fairly common, 

 breeds at the end of November. 



— ]4. Spermophila obscura, Tacz. ; Sharpe, Cat. B. xii. 

 p. 101*. 



White-throated Finch, Holland, Ibis, 1890, p. 426. 



* [This is a very interesting bird and new to the Argentine avifauna. 

 It seems to agree with a specimen in the British Museum obtained at 

 Salta by Durnford in 1878.— P. L. S,] 



