Notes from the Neighbourhood of Buenos Ayres. 157 
two are distinct? or are the white and slate birds only di- 
morphic varieties? Has any one seen the Asiatic race slate- 
coloured when in the nest, or observed the slate-coloured 
and white birds breeding together in India ? 

XVI.— Ornithological Notes from the Neighbourhood of Buenos 
Ayres. By Henry Durnrorp. 
Tue following notes were made during the first five months 
of my residence near this town, and, under many difficul- 
ties, at such times as I could spare from other employ- 
ment. The determination of the names of the skins I have 
made I owe to Dr. Burmeister’s kindness, who has ever been 
ready to render me all the assistance in his power*. Most 
of my notes have been made at Belgrano, where I live, a 
place situated about six miles to the north-west of Buenos 
Ayres, on the shores of the La Plata. I have also visited 
other localities, the names of which appear in the body of my 
notes. 
SYLVIIDA. 
I saw two individuals of Polioptila dumicola on 10th Oc- 
tober of the present year (1875), in some marshy ground near 
San Isidro. They were hunting amongst the reeds, some- 
what like Tits (Parus). 
TROGLODYTIDA. 
Troglodytes furvus (called “ Ratoncito”’ by the natives) is 
very abundant; it has a pretty little song, which it pours 
forth from the top of some bush, or perched on an aloe-leaf. 
On the 10th October I found eggs; the complement in a nest is 
usually five. The eggs are small and much speckled with red. 
I have seen many; and they differ considerably in different 
nests. These are made of bits of rush and grass, warmly 
lined with wool and feathers, and are generally placed in the 
stump of an old ombra-tree—the only indigenous tree, I be- 
* [These names we have altered to correspond with those used in the 
‘Nomenclator Avium Neotropicalium,’—Ep. |] 
wees, 

