Clangula clangula americana. Lake Umbagog, New England. Nest /8 (3023), May 26, I897, coll.C.H.Watrous. Female started from nest and well seen. Eggs heavily inc. In maple stub near mouth of Megalloway. Entrance hole a narrow crack 4 or 5 ft. long and opening quite down to nest which was 10 ft.above water. A large bunch of down clung to top of hole outside. Female sat closely but started finally after repeated pounding by W.at base of stub. Eggs not covered but abundance of down under and around them.I did not see this nest. Nest /9 (3024), May 26, I897, coll.C.H.Watrous. Female nest started from and well seen. Eggs all about half inc. Sweat meadow in tall slender stub. Entrance hole nearly round, of good size, 25 ft.above water. Nest 8 ft.below entrance. W.hammered long and hard at base of stub but bird did not show until W.was rowing off. Down exceptionally abundant & all but four eggs were quite covered with it. I did not see this nest in situ. Nest /2+6 (3025), May 26, I897, coll.C.H.Watrous. Fe- male Whistler started from nest and well seen. I egg of Whistler on point of hatching. All the other eggs about 2/3 inc. In tall ash stub 40 ft.above water. Two entrances, one in side of main trunk, the other in end of short lateral prong, both small & round- ed. Sitting bird flew out before W.reached the tree. She kept circling about & once alighted in the water near the tree. W.is positive she was a Whistler, but six of the eggs are unquestionably those of a Hooded Merganser. I was not with W.when he found and took this set.