The curlew sandpiper is only an occasional visitor to America, and with the exception of a single record from Point Barrow all the recorded instances have been reported from the eastern side of the Continent. It has been met with in Canada on two occasions, about ten times in the Eastern States, twice in the West Indies and once in Patagonia. _Courtship._--Very few observations on this species have been made on its breeding grounds in eastern Siberia, so our information as to its courtship is still very defective. The late Dr. H. Walter, during his enforced detention on the Taimyr Peninsula, from September, 1900, to August, 1901, while frozen in on board the exploring ship "Sarja," noted that they arrived on the Peninsula on June 13, and from that date onward were to be met with chasing one another in little parties of three or four over the tundra. There is no mention of any song flight (as in _Crocethia alba_, _Erolia temminchii_, _Arquatella maritima_, _Calidris canutus_, etc.). _Nesting._--The usual nesting place is on the gentle slope of the drier tundra, where the reindeer moss is interspersed with tufts of wiry grass and allowing a wide field of view over the neighborhood. Miss Haviland (1915_a_) noted that the actual nest hollow was rather deep, so that the pointed ends of the eggs were pointed downwards almost vertically. Walter describes them as shallow depressions, lined with a few dry bents, but H. L. Popham (1898) also remarks that "the nest was a rather deep hollow amongst the reindeer moss in an open space on a ridge of ground, somewhat drier than the surrounding swampy tundra, in much the same sort of place as that generally chosen by a grey plover." Although Middendorff undoubtedly met with birds about to breed, and indeed extracted a partly developed egg from the oviduct of a female which he had shot on the Boganida River in latitude 74° N., no one had actually found the nest of this species till Mr. H. Leyborne Popham (1898) visited the lower reaches of the Yenesei in 1897. Two years previously (August, 1895), he had met with family parties on the delta and had shot young which must have been reared in the neighborhood. On July 3, 1897, finding the way below Golchika blocked by the ice, he turned back to explore an island of soft tundra with a rocky shore. One of his men called out that he had seen a sandpiper and at once, according to his own words: