To A. D. Henderson and his guests is due all the credit for recent positive evidence. On June 18, 1924, he found a pair of dowitchers with two young, only a day or two old, "near a small lake in a muskeg about 17 miles northeast of Fort Assiniboine." The following season he found dowitchers again at three different places in the same region, "probably a dozen pairs in all"; and on June 2, about 35 miles northeast of Fort Assiniboine, he took his first set of three fresh eggs. The nest was "in a muskeg in open growth of small tamarac trees about 125 yards from a lake"; he describes it as "a hollow in a lump of moss, scantily lined with a few tamarac twigs, leaves, and fine dry grass, at the root of a small dead alder about 12 inches high"; it measured 1-3/4 inches deep and 4 inches across; the top was 4 inches above standing water. Mr. Harlow, who was with Mr. Henderson the next year, 1926, took two sets of four eggs each. One "nest was in an extensive tundralike muskeg, very quaking and wet, and the nest was in a small bunch of dwarf birch, not over 12 inches high, on the end of a little ridge of moss and completely surrounded on three sides by water." The male was seen "singing" near the nest. He joined the female after she had fluttered off the nest and the pair were seen feeding together; several times they stood erect and rubbed their bills together. After the eggs were taken a set of phalarope's eggs was placed in the nest; the dowitcher returned took one look at the eggs and then flew away and was never seen near the nest again. _Eggs._--One of Mr. Henderson's sets was apparently complete with three eggs, but four is the usual number. There is probably no constant difference between the eggs of this and its long-billed relative. One of Mr. Harlow's sets he describes as "light olive-green, rather lightly marked with pin points, spots, flecks, and a few blotches of dark umber and dark brown." The other set, he says, is slightly darker olive-green and is "much more heavily spotted and blotched with small and large spots of umber and brown and under shell markings of a lighter color." The measurements of 18 Alberta eggs average 40.8 by 29.2 millimeters; the eggs showing the four extremes measure =44= by 29.5, 41 by =30.3=, =38.2= by 28.5, and 38.7 by =27.7= millimeters. _Plumages._--The plumages and molts, which are the same in both forms, are fully described under the long-billed dowitcher.