BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 341 



rower. One has a buffy suffusion on the undersurface. An adult 

 female in winter plumage is more buffy than one shot in the breed- 

 ing season. A female, taken July 26, had the iris ochraceous buff; 

 bill andover green, shading to vetiver green at base of mandible; 

 tarsus and toes deep neutral gra3\ 



Family HTRUNDINIDAE 



IRIDOPROCNE MEYENI (Cabanis) 



Petrochelidon meyeni Cabanis, Mus. Hein., pt. 1, 1850, p. 48. (Santiago, 

 Chile. ) 



At Guamini, Buenos Aires, several were seen and an immature 

 female was taken on March 5, 1921. A dozen were recorded in 

 company with Pygochelidon on March 7. Near Concon, Chile, the 

 species was fairly common on April 27 and 28, and an adult male 

 was collected on the date first mentioned. 



As Cabanis's name for this swallow is a substitute for Hirundo 

 leucopyga " Lichtenstein " of Meyen,^^ the type locality for meyeni 

 must be the same as that for Meyen's leucopyga^ that is, the city of 

 Santiago. 



IRIDOPROCNE LEUCORRHOA (Vieillot) 



Hirundo leucorrhoa Vieillot, Nouv. Diet. Hist. Nat., vol. 14, 1817, p. 519. 

 (Paraguay.) 



Seven skins preserved of this swallow include the following: 

 Two adult males, Kilometer 80, west of Puerto Pinasco, Paraguay, 

 September 6 and 9, 1920; two immature males, San Vicente, Uru- 

 guay, January 27, 1921 ; adult male and female and immature male, 

 Banado de la India Muerta, 12 miles south of Lazcano, Uruguay, 

 February 3. Specimens in the United States National Museum 

 from the Province of Buenos Aires (collected in the sixties) have 

 a decidedly more greenish cast above than two from Paraguay, a 

 character in which skins from Uruguay in worn plumage seem some- 

 what intermediate. A definite difference possibly may be estab- 

 lished with better series. 



A male, taken September 6, had the bill black; tarsus and toes, 

 blackish brown number 1. Two juvenile specimens recently from 

 the nest had the gape and base of the bill yellowish. 



In the Paraguayan Chaco. from September 6 to 23, these little 

 swallows, like Iridoprocne hicolor in habits and appearance, were 

 common in areas where cavities in broken palms that stood near or 

 in shallow lagoons offered suitable nest sites. Males perched at 

 or above old woodpecker holes or other openings, calling and lifting 



^Hirundo leucopyga " Lichtenstein " Meyen, Nov. Act. Acad. Caes. Leop.-Carol. Nat. 

 Curios., vol. 16, Suppl., 1834, p. 73, pi. 10, fig. 2. (In der Stadt Santiago sehr haufig.) 



