56 BIRDS OF LA PLATA 
very pugnacious. The nest is made under a thistle or 
tuft of grass, in a depression in the soil, so that the 
top of the nest is on a level with the surface of the 
ground. The nest is mostly made and lined with 
horsehair, the eggs four or five, pale blue, and thickly 
spotted with dull brown. Sometimes, though very 
rarely, a nest is found in a bush or on a stump several 
feet above the ground. Two broods are reared in 
the season, the first in October, the second in Feb- 
ruary or March. I have known these birds to breed 
in April and May, and these very late nests escape 
the infliction of parasitical eggs. When the nest is 
approached or taken the Chingolos utter no sound, 
but sit in dumb anxiety, with tail expanded and 
drooping wings. 
There are three more species of the charming 
Zonotrichia Song-Sparrows within the Argentine 
country, one of which, the Patagonian Song-Sparrow, 
4. canicapilla, I found very abundant in Bahia 
Blanca and on the Rio Negro. In appearance and 
habits it was not distinguishable from the Chingolo 
Song-Sparrow, but differed slightly in its song, this 
being without the concluding trill. 
