426 Mr. A. H. Holland on some Birds 



is yet much to be done in working out the Argentine Avi- 

 fauna. — P. L. S.] 



1. White-throated Finch. 



This little Finch I am unable to name, as T cannot find a 

 description to suit it. 



The nest was placed in the fork of a poplar-tree low down. 

 It was composed of twigs, rootlets, thistle-down, leaves, and 

 moss, and lined with white cow-hair. The eggs were pointed, 

 white, faintly spotted with pale red. 



[The specimen sent, marked g , appears to be a female or 

 young female of Spermophila ccerulescens (Arg. Orn. i. p. 46), 

 but I should like to see more examples of both sexes. — 

 P. L. S.] 



i~ 2. Tyrannus melancholicus. (Arg. Orn. i. p. 158.) 



In November I took a nest of this bird in a small Euca- 

 lyptus wood. It contained eggs of Molothrus bonariensis. 

 The nest was placed at the outermost end of a bough, in a 

 very exposed situation, and was very slight, being composed 

 of a few roots and twigs firmly interwoven and lined with a 

 very little hay. 



The nest contained two eggs of the Tyrant and two of the 

 Cow-bird; those of the latter were white, thinly spotted 

 with pale red. 



3. Leptasthenura ^githaloides. (Arg. Orn. i. p. 177.) 

 Common. In October, during the last week, I found 



three nests of this Spine-tail, all of which were in those of 

 deserted Oven-birds. The first nest was composed of num- 

 berless soft feathers, with a little grass as a lining, the others 

 of feathers and wool, with no lining besides. The eggs were 

 three in one nest and one in another ; they are white, very 

 broad towards the larger end, and thick-shelled, without 

 any gloss. 



4. Buteo, sp. inc. 



This Buzzard arrives here towards the middle of January 

 in company with Buteo swainsoni, the latter in immense 

 flocks. In the daytime the flock departs over the camp, 



