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 bub- 

 bling 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) ; Laz- 

 cano, 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 con- 

 cealed 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 fol- 

 lowing localities; Victorica, Pampa, December 23 to 29 (a pair 



