(I) Oidemia americana. Odimia Americana, 1889. Maine. T. Umbagog Scooters of all three species were more numerous in Umbagog this autumn than I have ever known them to be before; among them the present species represented fully seventy-five per cent of the total number. I saw the first flock September 21st It contained three adult males and four brown birds, probably females. I shot two males. The next seen were on October 3d when a flock of fully one hundred came into the Lake. Of these at least ninety were adult males and several of the remaining ten, all of which were brown birds, were Surf Scoters. On October 10th a flock of about seventy-five alighted in the Lake. Of these fully nine tenths were females and young. On the 12th I saw a flock of seventeen, on the 16th a flock of nine, on the 19th a flock of thirty all of these being brown birds. Besides these records, most of which were authenticated by shooting specimens, I saw several other flocks, at too great a distance to be sure as to whether they were American Scoters or Surf Ducks. On October 30th at about 8 A.M., just as I was leaving Lakeside on my way home, an extraordinary number of Scoters appeared over the Lake, circling about and finally alighting in several distinct flocks. The largest flock contained at least six hundred birds and in all there must have been fully one thousand in sight from the house at one time. They were so far away that I could not identify them, but they all certainly belonged to either one of the other of the two species just mentioned and doubtless represented both. It will be observed from the foregoing that the first flocks which came into the Lake were largely composed of adult males, showing that these migrate first. Nearly all the larger flocks contained a few Surf Scoters although the latter often occurred in flocks by themselves. Both species invariably came into the Lake sometime between daylight and ten o'clock A.M., usually between six and eight A.M. We often saw them come in and in no instance that I remember were any observed swimming in the Lake before sunrise. They came from the west or the north-west and during their descent made a prodigious noise which resembled the sound of wind blowing through pines, or still more closely, that of escaping steam. Looking up we would often discover a cluster of black specks two or three thousand feet above the Lake, shooting down almost vertically with set wings. After descending to within one hundred feet or less of the water they would either make a wide circle to check their force of their descent and then alight, or oftner resume their flight on a level plane and course