Bulletin - United States National Museum - si-pddr - Smithsonian ...

368 BULLETIN 133, UNITED STATES NATIONAL MUSEUM
peer about, in the slow manner usual to vireos. At a squeak they
came down to peer at me with the crown feathers raised. The
song, given Avithout interruption during search for food, is a series
of phrases, similar to but possibly slightly less emphatic than that
of the northern red-eye.
At Tapia, Tucuman, from April 10 to 13, the species was fairly
common in dense scrub, where it traveled in company with parula
warblers and other small bush and tree haunting birds. The birds
had ceased singing then, though their complaining call note was
heard at intervals. An adult male taken was extremely fat.
An adult male, shot January 30, had the maxilla dusky neutral
gray; base of gonys washed with pallid brownish drab; r. st of
mandible clear green-blue gray; iris Vandyke brown; tarsus and
toes light Medici blue.
Family COMPSOTHLYPIDAE
BASILEUTERUS HYPOLEUCUS Bonaparte
Basileuterua hypoleucus Bonaparte, Consp. Av., vol. 1, 1850, p. 313.
(Brazil.)
An adult female, shot September 1, 1920, at Kilometer 25, west
of Puerto Pinasco, Paraguay, the only specimen collected, differs
from skins of hyj)oleucus from Matto Grosso in the yellow under
tail coverts and the yellowish wash on the lower breast and abdomen.
It is possible that this bird represents a distinct race.
The specimen was one of several found in heavy woods on a low
hill, where the birds fed actively througli the tops of the lower
growth. They were observed in little parties of three or four,
apparently families since a part were fully grown young.
BASILEUTERUS AURICAPILLUS AURICAPILLUS (Swainson)
Setophaga anricapilla Swainson. Auim. in Meuag., 1S38, p. 293. (Brazil.)
Near Las Palmas, Chaco, this Basileuterus was fairly common on
July 13, 14, 17, and 21, 1920. Two were taken, an adult female,
July 13, and one with sex not marked, July 21. The birds frequented
dense thickets and heavy woods, where they hopped ac-
tively about among the smaller twigs with flitting wings and jerking
tail. On February 5, 1921, I secured another, an immature
male, found in dense growth along the Rio Cebollati, near Lazcano,
Uruguay, in company with a mixed flock of Serpophaga and
Thamnophilus. The Basileuterus worked through the lower limbs
between 1 and 2 meters from the ground with the tail wagging in
a characteristic manner.