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372 BULLETIN 133, UNITED STATES NATIONAL MUSEUl^I
from the mountains of northwest Argentina may record a darker
mountain form as an addition to the Argentine list.
The present warbler was one the most widely distributed of
forest-haunting birds through the Chaco, in suitable areas in Uru-
guay, and in the wooded areas of Tucuman. During winter it
joined little roving bands of birds of similar habits and was found
everywhere in groves and thickets. The pitiayumi warbler is char-
acterized by active, agile motions that carry it rapidly through the
smaller branches. As spring approached males sang a song, similar
to that of the northern species of the genus, that may be represented
as swois swois swols see-ee-ee zee-ee-ee-ee-up. Young that had not
finished the post-juvenal molt were taken at Lazcano, Uruguay, on
February 5, and the birds here were seen in little flocks of 20 to 25
individuals. The usual call was a sharp tsip.
A male, taken Jul}^ 8, had the upper mandible dusky black ; lower
mandible and extreme edge of upper for basal half ivory yellow,
shading toward dusky at tip ; inside surface of lower mandible ivory
yellow; of upper mandible dull olive yellow; tongue flesh color,
becoming dusky at tip; tarsus dusky brown; toes yellowish; iris
dark brown.
ATELEODACNIS SPECIOSA SPECIOSA (Temminck)
Sylvia speciosa Temminck, Nouv. Rec. Planch. Col. (vol. 3), livr. 49, pi.
293, fig. 2, (Rio de Janeiro, Brazil.)
On July 27, 1920, an adult male was taken near Las Palmas, Chaco,
among the thorny bushes of an open scrub scattered across a broad
savanna. Another was recorded on September 1, at Kilometer 25,
west of Puerto Pinasco, Paraguay, in company with other small
brush birds in the tree tops, and a pair was seen September 21 near
Kilometer 80, in the same region. The birds were active, but at
the same time deliberate and certain in their movements as they
passed among the branches or bent forward and down to examine the
underside of twigs.
The male taken has a wing measurement of 59 mm. and is slightly
larger than two seen from Bahia. The only previous Argentine
record for the species seem to be one taken at Ledesma, Jujuy, on
July 13, 1906, by L. Dinelli.«^
Family ICTERIDAE
DOLICHONYX GRYZIVGRUS (Linnaeus)
Fringilla oryzivora Linnaeus, Syst. Nat., ed. 10, vol. 1, 17.58, p. 179.
(Cuba.)
Field observations in the Chaco, where the bobolink is found
during the northern winter, were carried on during the period when
«sLillo. M., Apuntes Hist. Nat. (Buenos Aires), vol. 1, Mar. 1, 1909, p. 43.