The female upon one's approach plays the familiar artifice of simulating a prostrated condition, limping and dragging herself along the ground in an effort to attract one's attention from the nest. In this they are bold and fearless; and when one sits beside the nest they will frequently run up to within a foot or less of the observer. In photographing nests from a distance of only a few feet, the female will often return to her eggs while one's head is under the dark cloth adjusting the focus. One was so devoted to her eggs that she would run up and peck at my fingers and run over my hand as I extended it toward the nest. This species, when one approaches the nest, usually leaves it when one is 20 to 25 yards distant and runs along the ground, either directly toward the intruder or a little to one side. Because of its remarkable similarity to the covering of the tundra at this time, this first movement often escapes one, and consequently when the bird is first observed fluttering along the ground one naturally imagines himself near the nest, when, in reality, it may be 20 or 30 yards away. This ruse is a clever one, and no doubt would often save the nest from violation. The nests are easily found by retiring and watching the female with the glasses. They usually return to the nest with little artifice or delay; in fact, often within two or three minutes. The above procedure is not an invariable practice, as one female I knew would flush directly from the nest to begin her tactics only when there was danger of the nest being actually trodden upon. _Eggs._--The four eggs usually laid by the white-rumped sandpiper are ovate pyriform in shape; all that I have seen are uniform in shape and have characteristic colors and markings. One of the two sets in the United States National Museum has a "deep olive buff" ground color, and the eggs are heavily blotched about the larger end, sparingly spotted elsewhere with "wood brown," "warm sepia," and "benzo brown," and with a few underlying spots of various shades of "brownish drab"; an egg from this set is well figured by Frank Poynting (1895). The other set differs from this one in having the ground color lighter, "olive buff," and the spots finer, more scrawly, and lighter in color; the underlying drab markings are also more numerous. There is also a set of four eggs in the Thayer collection, taken with the parent bird by Alfred H. Anderson on Taylor Island, Victoria Land, July 7, 1919. These eggs are much like the egg figured by Mr. Poynting, except that in one or two of the eggs the ground color is more greenish.