Empidonax traillii alnorum. Empidonax trailli. Maine (Lake Umbagog). 1872. June 3- 14. Near the top of Upton Hill we found these Flycatch- ers abundant. One locality, comprising about three acres of alder thickets fringed about the edges with scattered poplars, literally swarmed with them, and af- ter twenty had been shot there their numbers were not appreciably diminished. Although at this time they were evidently settled for the season, they had not apparently, begun to breed, but last year's nest were found in abundance. These Flycatchers are very quarrel- some, fighting fiercely with each other, and driving all other birds from their retreats. They keep low down in the bushes, frequently perching not more than six inches above the ground. They appeared to catch flying insects less often than do other Empidonaces. They are very shy, and when pursued usually flit on ahead keeping near the ground and just out of range. Often one will start as if to fly only a few yards but really go the whole length of the thicket. This trick was noticed repeated- ly. They also have a habit of alighting with their backs towards the pursuer; nine out of ten were shot in the back. Their notes are numerous and uttered almost incessantly. What seems to be the song of the male is an emphatic quee-wooohy or quee-wench, sometimes Queo- quoah. The ordinary cry of both sexes is a petulant pip sometimes repeated several times in quick succession. They also utter an angry, querulous twitter, especially when fighting. When their retreats are invaded those in the immediate neighborhood become at once silent, although the report of a gun does not seem to alarm them. The males sing indifferently from the depths of the thicket or from the tops of the higher alders. Although they sometimes perch on the branches of trees overhead, they rarely sing in such situations. On June 9 we found Traill's Flycatchers numerous in the willow thickets along the edges of B Meadow, A female was seen building there. Nest A/3, (1839), June 27, 1873, Upton, coll. Wm.Brewster. Female started off nest & shot. In up- right fork of water willow 12 in.up. Bushy thicket sloping down to the lake shore. Eggs slightly incubated.