27 UPTON, MAINE 1872 June 2 - 14 several occasions I shot the males in the tops of enormous beech or birch trees, seventy or eighty feet in height, growing along the edge of the woods: in such situations they showed considerable activity, chasing insects among the branches and frequently singing. Although they sang from lofty exposed situations much oftener than the yellow throat, such habit so far from being the rule as noted last year I should now call rather the exception, the song usually coming from on or near the ground among the logs: it was short but exquisitely sweet with a warbling terminating the whole nearly like whees-whees- whees-whees, tu-tu-tu-tuo varying however in different individuals, in some much shorter whees-whees tuo tuo. Occasionally they sang in the air soaring high up like S. auropapillus pre-fixing a few extra notes to the ordinary ones and at the end closing their wings and coming down as if shot to the ground. Hel. ruficapilla. Very scarce but generally distributed. (Not scarce in 73) H. perigrina. Quite as numerous as last year. Sciurus auropapillus. Not more than three or four individuals observed. (Not scarce and gen. distributed in 73) Sciurus noveboracensis. Not common around the lake but in the swampy thickets all the way up Cambridge river they absolutely swarmed: there is a striking uniformity in the notes of different individuals of this species: they always sing low down and in the darkest depths of their retreats. (Young flying by June--73)