136 
Barrows on Birds of the Loiver Uruguay . 
[July 
45. Leistes superciliaris Bp. Pecho-colorado (Red- 
breast). — My attention was first called to these birds by a some- 
what odd habit of the males soon after their arrival from the 
north early in October. They rise quickly and silently by vigo- 
rous beats of the wings to a height of fifty or sixty feet, when 
they suddenly spread the wings and glide slowly down to the 
ground again, at the same time giving vent to a wheezy little 
song, which suggests the idea that the exertion of the ascent has 
left very little breath for vocal exercises. The wings are not 
moved at all during the descent until within a few feet of the 
ground. This exercise is repeated once in every two or three 
minutes, sometimes for hours together, and the sight is very 
pleasing when, as is usually the case, the birds are quite numer- 
ous. The nest is placed on the ground and the eggs are spotted. 
The only set taken was found December 20, 1880, and consisted 
of four fresh eggs. The birds are only found in open, wet, 
grassy places, and while many pairs may be found in the same 
meadow or field, they never seem to be truly gregarious, even 
after the nesting season is over. 
46. Sturnella defilippii Bp. Pecho-Colorado (Red- 
breast). — Not found at Conception at all, nor was it met with 
until reaching Azul. At this place and further south it seems 
to replace the preceding species and bears the same name. It 
was seen nearly every day during our trip to the Pampean 
Sierras, and only parted company with us at Puan after several 
severe frosts. At the last-named place the flocks frequently 
numbered several hundred individuals, and during the whole 
time of our acquaintance with it it was always seen in large 
but scattering flocks. 
47 * Cyanocorax pileatus Temm. Urraca (in imitation 
of its usual call-note). — Confined to the islands in the river and 
to the deep woods along the shores, where it is resident through 
the year. Even in such places it is no longer abundant, and 
very few specimens were obtained. 
The following twelve species, belonging to the sub-family 
Fluvicolince Cab. {Tceniopterince Bp.), form one of the most 
interesting groups found in the Argentine Republic. To almost 
all the general habits of Flycatchers they add others peculiarly 
their own, some of which are not readily explainable. 
