BIRDS OF ARGENTINA, PARAGUAY, URUGUAY, AND CHILE 361 



This pipit was locally common in some of the areas visited, and 

 though closely similar to A. c. correndera^ with which it was often 

 associated, was readily told by its grayer, less distinctly streaked 

 dorsal surface, and by the fact that in walking it did not tilt the 

 tail. Near Berazategui, Buenos Aires, I secured my first specimen 

 on June 29, 1920, on low, wet ground near the Rio de la Plata. At 

 Carhue, Buenos Aires, from December 15 to 18, the birds were 

 common over rolling, open country covered with low tufts of grass. 

 At this season they were in pairs and were nesting- As I crossed 

 the plains it was common for a pair to rise to circle about with 

 strongly undulating flight and utter chirping calls of alarm until 

 T had passed beyond their limits. Often males alone rose to accom- 

 pany me for a short distance, darting down frequently to pass near 

 the female when she remained u]3on the ground. On December 16, 

 as I walked rapidly across the open prairie, a male pipit suddenly 

 rose behind me with a sharp alarm call that brought his mate flutter- 

 ing out from a nest concealed beneath a clump of grass almost at my 

 feet. The nest was a thin-walled cup of grasses, lined with ma- 

 terial of a finer texture than the exterior, placed in a slight depres- 

 sion, so that the rim was flush with the surface. The two hard-set 

 eggs that it contained have a buffy white ground color, almost con- 

 cealed by obscure spots and blotches of pale ecru drab and snuff 

 brown. They measure 19 by 14.6 and 19 by 14.4 mm. A young bird 

 only recently from the nest, taken December 15, is dull blackish 

 above, with each feather margined with pinkish buff, producing a 

 mottled appearance. The hind claw already is well developed, 

 though the tail has not yet attained its full length. 



At Victorica, Pampa, three were found in a little opening sur- 

 rounded by bushes, and a male, which I shot, flew up to alight on a 

 twig. At San Vicente, Uruguay, January 31, a breeding male was 

 taken on the open shore of a lagoon in the same area where a breed- 

 ing male of A. c. correndera was secured. On February 3 adult and 

 juvenile individuals in molt into fall plumage were found south of 

 Lazcano, Uruguay, and the birds were common until February 9 

 as far as Corrales. Scattered flocks frequented rolling uplands near 

 Rio Negro on February 21- At Guamini, Buenos Aires, scattered 

 flocks were found through fields and along alkaline shores near the 

 Laguna del Monte. 



ANTHUS CORRENDERA CORRENDERA VieUlot 



Anthus correndera Vieillot, No«v. Diet. Hist. Nat., vol. 26, 1818, p. 491. 

 (Paraguay and Rio de la Plata.) 



Specimens taken of this pipit include the following : San Vicente, 

 Uruguay, January 31, 1921, adult male; Dolores, Buenos Aires, Oc- 

 tober 21, 1920, a pair ; Lavalle, Buenos Aires, adult male, November 



