Cape San Antonio, Buenos Ayres. 29 
are in the eaves of outbuildings, imterior of barns, hay- 
stacks, &e. &e. (The nest, I should state, is an open one.) 
If Z. pileata chooses a nesting-site in a shed or barn, no 
amount of traffic or pulling down the nest, will make it give 
up its building-operations. I remember, one shearing-season, 
a pair showing such remarkable persistence. Just before the 
siesta we were in the habit of throwing all the half-filled bags 
of wool &c. into a pile, in order that there might be no time 
lost in covering them up should a thunder-storm arise during 
that hour. Well, these birds thought this was an excellent 
place for a nest; and every day for over a week, on taking 
down the pile in the afternoon, I found that they had com- 
pleted an entire nest, all but the lining, during the two hours 
of the siesta. Ultimately, however, they desisted, in evident 
disgust. Another site for a nest was the interior of a bullock- 
cart, in a fold of the canvas “toldo,” the cart not being in 
use at the time. 
Four is the maximum clutch of eggs, the usual number 
being three. They vary as much in size as in colour; and in 
a series like mine specimens occur which, but that they were 
identified in person, would never have been credited to Z. 
pileata. The usual type has a greenish ground, thickly spotted 
with reddish brown ; and an average (of thirty-one specimens) 
gives #1 x 73 as the measurements. 
32. SIsoPYGIs ICTEROPHRYS. 
Rather rare, there perhaps not being more than two pairs 
in the woods surrounding the head station. These remain 
with us all the year round; but, from their rarity and shyness, 
my notes relating to their habits are very incomplete; so I 
will merely give a short description of the nest and eggs in 
the meantime. 
Breeding-Notes.—It breeds about the end of October and 
beginning of November, placing its nest among some twigs 
or shoots on the trunk of a tala tree, five or six feet from the 
ground. The nest is shallow, and stragglingly built of dry 
wild vine-tendrils, lined with fine grass. 
The eggs, which I have never found to exceed three in 
