356 BULLETIN 133, UNITED STATES NATIONAL MUSEUM 



a low tree. The song period began, in Paraguay, the first of October, 

 and extended to the time of molt in February. Their usual call note 

 was a low pup pup varied with several louder, laughing calls that 

 were heard especially toward dusk. On a fall evening in April, 

 as J. L. Peters and I descended a trail on the slopes of the Sierra 

 San Xavier, in Tucuman, robins called and answered on every side 

 from the heavily forested slopes. In spite of their retiring habits 

 the birds were curious, so that it was easy to call them out and shoot 

 what specimens were wanted. On several occasions they were 

 observed feeding on wild fruits, once (at E,esistencia, Chaco) on 

 the berries of Rapanea laetevirens. The species is one that is hunted 

 to some extent and will need protection to maintain it in its pres- 

 ent abundance. 



A nest, found October 30 (at Los Yngleses), was placed in a tala 

 tree 4 feet from the ground, where several small shoots projecting 

 from the side of the trunk (which was 12 inches in diameter) fur- 

 nished a firm support. The nest was made of the dried stalks of 

 weeds mixed with a small quantity of fresh green material, and was 

 lined with rootlets. A rim made of cow dung ran part around, but 

 there was no complete cup of such material. This nest contained 

 three eggs of the thrush, and three of those of the common cowbird 

 {Molothrus h. honariends) . The thrushes' eggs have the ground 

 color much paler than pale Niagara green, blotched and spotted with 

 brick red and chestnut brown. Two of the eggs are boldly marked 

 over the entire surface. The other has small, scattered spots 

 throughout, with heavy markings at the larger pole. These eggs 

 measure 28.7 by 21.4; 28.7 by 4; and 28.5 by 20.9 mm. Another nest, 

 examined November 10, that contained one egg, had a solid cup of 

 hardened earth that contained the nest lining. 



TURDUS MAGELLANICUS PEMBERTONI Wetmore 



Turdus magellanicus pem'bertoni Wetmore, Univ. Califoruia Publ. Zool., 

 vol. 21, no. 12, June 16, 1923, p. 335. (Cerro Anecon Grande, Rio 

 Negro, Argentina.) 



The present form is distinguished from T. m. magellanicus by 

 grayer coloration both above and below, .a distinction easily evident 

 when series are compared. Hellmayr'*^ considers magellanicus as 

 subspecifically allied to T. falcMandii from the Falkland Islands, 

 but, though the two are evidently of the same stock, difference be- 

 tween them, in my opinion, is sufficiently great to warrant their 

 specific separation. 



This bird, which might with propriety be known as the willow 

 robin, was fairly common in the groves of large willows bordering 



«Nov. Zool., vol. 28, September, 1921, p. 238. 



