Dendroeca caerulescens. Maine (Lake Umbagog). copy ① 1873. Aug. 11. Came upon a brood of four very young birds in first plumage, attended by both parents. The family moved rapidly through the woods, keeping rather low down, the young twittering loudly and incessantly. One note of the adult is a soft cluch precisely like that of Junco. Sept. 22. Several along the banks of Cambridge River. Their ordinary note is exactly like that of the Junco. 1879. May 25. A single male singing in the woods. June 9. Common below the Dixville Notch. copy ② " 18. Set A-4. -- Incubated about four days. Nest in Yew directly under a large prostrate log and about fif- teen inches above the ground. Male singing about thirty yards off. The female started from the nest when I was about fifteen feet away and quickly returned, chirping incessantly, when the male joined her and flitted about near by quivering and trailing his wings, and spreading his tail. The locality was a hillside covered with spruce and beech with an undergrowth of Yew. copy ③ " 20. They are much more abundant along the Anover road than I have ever found them elsewhere in this region. I think they prefer higher land than that about the Lake. I heard three males singing at one time to-day, and many single ones, all in woods where Viburnum lanta- noides formed the only undergrowth, there being no ground hemlock or young firs. " 24. Abundant in Grafton Notch. 1880. copy ④ June 8. A last year's nest in Yew. Like the two found last week, and unlike the one taken last year, it was placed in the fork of an upright spray and should be seen several rods off. These nests, with their thick walls of inner felted bark and lining of black rootlets, are at once distinguishable from those of any other Warb- ler breeding here. 50