9 ° 
Barrows on Birds of the Loxver Uruguay. 
[April 
Golondrina, and its appearance after the cold weather is hailed 
as one of the earliest signs of returning summer. Through Octo- 
ber and November it breeds at Concepcion wherever it can find 
a suitable spot, placing its nest of grass, wool, and feathers in 
any safe cavity about a dwelling-house or shed, or not infrequently 
in the deserted nest of a Furnarius or Anumbius . 
From a nest of the latter bird I took a set of this Swallow’s 
eggs — five in number — on October 30, the parent birds hovering 
close about my head as I examined the nest. The eggs are pure 
white. During the mating season the male has a very pretty 
song not unlike that of the Eastern Bluebird, though not as long, 
and seldom delivered without interruption. 
15. Atticora cyanoleuca ( Vieillf. — This species was first 
seen at Concepcion September 4, 1880, when it was observed in 
consumable numbers, associated with the preceding species, 
from which it was easily distinguished by its smaller size and the 
absence of the white rump. For nearly six weeks it was observed 
here from time to time, but after October 20 it was not noted until 
at Azul it was found in large flocks January 27, 1881, seemingly 
ready to migrate northward. It was seen, however, at Bahia 
Blanca a few days later and then almost daily until March 28 at 
Puan, after which it was not again observed. Of its breeding 
habits I know nothing. 
16. Cotile ruficollis ( Vieillf. — Abundant at Concepcion 
through the summer, arriving from the north early in August. 
It is said to nest in holes in banks, and I once dug out several 
deserted Swallow’s nests supposed to belong to this bird, though 
none were seen in the neighborhood. The nests were of straw 
and feathers at the ends of holes about two feet in depth, and in 
pretty hard earth which formed a bank eight or ten feet high 
beside a small stream. A bird of this species frequently visited 
an open and deep well just in front of my door. I repeatedly 
saw it descend into the well but could never see it come out, or 
find it within. Probably it hid itself between the stones of the 
wall where it was prospecting for a home which it failed to find. 
17. Stephanophorus leucocephalus ( Vieill. ) . Cardinal 
imperial. — A more beautiful bird than this Tanager it would be 
difficult to find, at least on the Uruguay, and when, in one of 
those narrow passages between the islands where the trees lean 
toward each other and solid walls of green rise on either side your 
