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

BIKDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 329
Ui-ugiiay, February 14, and a male from Tapia, Tucuman, April 13.
The species was common in thickets near streams in southern Uruguay
(La Paloma, January 23, San Vicente, January 25 to 31, Rio
Negro, February 14), but in Argentina was seen only on the two occasions
when specimens were taken, as noted above. The birds were
found on low perches among rather dense growth, where they made
short flights from twig to twig or rested quietly with twitching tail.
At the end of January they were breeding, and young were on the
wing by the middle of February. Males in the nesting season gave
an emphatic little song like that of some Einpldonax^ uttered from
secure retreat among willows or similar shrubs. When alarmed
about their nests they uttered a low tsip.
MYIOPAGIS VIRmiCATA VIRIDICATA (Vieillot)
Sylvia viridicata Vieillot, Nouv. Diet. Hist. Nat., vol. 11, 1817, p. 171.
(Paraguay.)
On September 30, 1920, at the base of the Cerro Lorito on the
eastern bank of the Rio Paraguay, opposite Puerto Pinasco, Para-
guay, attention was attracted to this flycatcher by its sharp ex-
plosive note cJiur esp. The bird perched in heavy cover in the tops
of trees and shrubs, in dense forest, occasionally flying out after
insects. Only through its peculiar call was I able to follow it and
secure it. It proved to be an adult male in breeding condition. This
bird has the following measurements: Wing, 63.7; tail, 59.8; culmen
from base, 10.6; tarsus, 15.7 mm."
SUIRIRI SUIRIRI (Vieillot)
Muscicapa suiriri Vieillot, Nouv. Diet. Hist. Nat., vol. 21, 1818, p. 487.
(Paraguay.)
The suiriri flycatcher was common through the Chaco from northern
Argentina into Paraguay, and in the wooded country in the
territory of Pampa and northern Tucuman. Dates and localities
(with specimens preserved indicated in parentheses) at which it was
recorded are as follows: Las Palmas, Chaco, July 13 to 31, 1920
(male taken July 13, female July 18) ; Riacho Pilaga, Formosa,
August 7 to 18; Formosa, Formosa, August 23; Kilometer 80, west
of Puerto Pinasco, Paraguay, September 7 to 20 (females taken
September 7 and 11) ; Kilometer 200, west of the same point, September
25; Victorica, Pampa, December 23 to 29 (adult male taken
December 23, two adult females December 24 and 28) ;
Tapia, Tu-
cuman, April 6 to 13) males taken April 6, 11, and 13, on* juvenile
with sex indeterminate September 11). Birds secured in December
were in worn plumage, those shot in April were in molt. In the
Juvenal plumage (shown by one individual) described previously
" For discussion of the forms of this species, see Berlepsch, Proc. Fourth Int. Ornith.
Congr., February, 1907, pp. 425'-431.