AVES CHARADRIID^ 323 



brown of each feather an arrow-like shape. This area extends on the 

 lower neck to the upper throat and chin, where the dusky area of each 

 feather takes the form of streaks ; under wing coverts and axillaries white. 



Bill, deep greenish black, palest at base. 



Legs and feet, greyish yellow shaded with brown. 



Iris, deep hazel brown. 



Fig. 165. 



Hcteropygia maadata. Winter plumage. P. U. O. C. 3984. Three eighths natural size. 



Adults in winter have the upper parts more uniform, the dark streaking 

 being much less pronounced and the lighter tints not so buffy or rusty. 

 The lower parts are much as in summer, but the dusky of the pectoral 

 band is obscured by the longer buff grey edging of the feathers. 



Young birds of the year are more like breeding birds than winter adults. 

 They differ in being much more rufous in general appearance and the 

 scapulars and inner secondaries are very conspicuously margined with 

 white. The breast and fore-neck are similar in marking to winter adults, 

 but again the rusty tone prevails. 



Geographical Range. — North and South America. Breeding in the 

 Arctic regions of North America and migrating south in winter so that 

 representatives are found as far south as Chili and Patagonia, though 

 many remain in the warmer portions of North America (Texas, Florida, 

 etc.) during the winter months. 



The naturalists of the Princeton Expeditions did not record the Pec- 

 toral Sandpiper, but the records for that region are many and are referred 

 to in detail in the citations of the literature of the species. The descrip- 

 tions here given are based on the large series in both the Museum of 

 Princeton University and the British Museum of Natural History. 



"Common in flocks at Concepcion through the larger part of the year, 

 only absenting itself from the middle of November to the middle of Jan- 



