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 128 THE CONDOR Vol. XIV Limosa fedoa. MARBLED GODWtT. Observed June 24. 1906; May 11, 17, July 5, 28, 1907; and May 10 and 30, 1908. Totanus rnelanoleucus. GRrTER YELLOW-LEeS. Observed April 26, May 11, July 4, 6, 14, 21 and 28, September 2, and October 5 and 25, 1907; and April 19, May 3, June 27, July 12, and August 15, 1908. Totanus flavipes. YELnOW-nE(s. Observed April 21, 27, July 5, 21, 28, September 2 and October 5, 1907; and April 19, 26, May 17, June 28, July 12, Augus't 15 and 22, 1908. Catoptrophorus sernipalrnatus inornatus. WESTERN WxLnm . Observed May 11, 18, July 21 and 28, 1907; and April 20, May 3, 10 and June 19, 1908. Throughout this list of dates a remarkable similarity of movement appears to exist; the last three veeks of June being the only ones during the entire breed- ing season that most of the above species were not seen. It is also significant .I Fig. 54. TYPICAL "NEST" OF KILLDEER that the five species which were seen during this period (namely, Least Sand- piper, Marbled Godwit, both Yellow-legs. and Western Willet) are the species most likely to be found breeding in this locality. Generally speaking the month of June appears to be the month during which all these species are least in evi- dence, and a decided influx of the birds is seen soon after the first of July. In short the dates here given bear out Prof. Cooke's theory almost to the letter. Bartramia longicaucla. UPLAND PLOVER. Cooke in his "Birds of Colorado" states that the Bartramian Sandpiper breeds abundantly upon the plains. The word "abundant" is at best a relative word; yet during ten years field work the one nest we found near Barr was the only one I have ever seen, nor have I heard of any other Colorado field workers who have actually taken the eggs, and so far as I am aware there are no definite