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

348 BULLETIN 133, UNITED STATES NATIONAL MUSEUM
jjairs collected) ; and Riacho Pilaga, Formosa, August 7 to 18 (adult
male shot). It is supposed that those recorded at Formosa, Formosa,
August 23; Tapia, Tucuman, April 6 to 13; and Tafi Viejo, April 17,
were of this same race.
The southern house wren, of whatever race, in action and general
appearance is the same busy bird, full of life and energy, that greets
us in our northern dooryards, and is one of the first species to be
recognized on arrival in unfamiliar southern scenes. Notes and
actions are unmistakably those of a house wren, and even the bubbling
song is not noticeably different. In the Chaco they were found
in tangles of brush bordering thickets or in clumps of grass at the
borders of savannas from which they darted back into the brush
when alarmed. They were in full song in June and July, and sang
occasionally during April when they were in molt. They were seen
on the Sierra San Xavier, above Tafi Viejo, Tucuman, from the base
to an elevation of 1,800 meters.
TKOGL.ODYTES MUSCULUS BONARIAE Hellmayr
Troglodytes musculus tonariae Hellmayr, Anz. Ornith. Ges. Bayern, uo. 1,
Feb. 25, 1919, p. 2. (La Plata, Buenos Aires.)
The pampan house wren was found at Berazategui, Buenos Aires,
June 29, 1920 (immature female taken) ; Dolores, Buenos Aires,
October 21; Lavalle, Buenos Aires, October 23 to November 13
(adult male taken) ; Montevideo, Uruguay, January 9, 1921 (seen
in the city) ; Carrasco, Uruguay, January 16; La Paloma, January
23; San Vicente, January 25 to 31 (adult male, collected) ; Lazcano,
Uruguay, February 5 to 7 (a pair) ; Rio Negro, Uruguay,
February 14 to 19 (four males, adult and immature shot). One
that I saw March 3 near Guamini, Buenos Aires, was perhaps
this same subspecies but may have been chilensh.
A nest found February 7, 1921, near Lazcano, Rocha, Avas concealed
in a hollow in a fence post standing near a thicket. The birds
used a crack in one side as an entrance, and had constructed a
slight cup of feathers and fine grasses lined with horsehair that
contained four eggs with incubation far advanced. These eggs
have the ground color grayish white, finely and uniformly spotted
throughout with vinaceous, Corinthian red and brick red. They
measure 17 by 13.8; 16.8 by 13.8; 16.4 by 13.8; and 16.1 by 13.4 mm.
TROGLODYTES MUSCULUS CHILENSIS Lesson
Troglodytes chilensis Lesson, Voy. Coquille, Zool., vol. 1, pt. 2, April,
1830, p. 665. (Concepcion, Chile.)
Under this name is grouped a series of specimens from the following
localities; Victorica, Pampa, December 23 to 29 (a pair