Sitta canadensis. Lake Umbagog, Maine. 56 1880. June 5. Nest with young on the lake shore; entrance hole on east side of dead maple stub surrounded by water; height fifteen feet. An abundance of fresh pitch smear- ed just below the hole; the male and female came alter- nately with food at intervals of about a minute; they were feeding the young entirely on Doptera which they caught on the wing. 1881. May 14. Three nests building. In one the female was busi- ly at work excavating the rotten wood; the male keeping up a continual nasal whining cry. In another the cavity was completed and the female building her nest. We watched her for sometime as she crept about the trunk of the arbor-vitae tearing off shreds of bark; this pair also was very noisy. " 26. A female building her nest in a hole where I found a nest with young last year. She came and went at least once a minute, uttering the finest kind of a pi- ping chirp as she flew, and apparently bringing only one shred of bark at a time. copy 6 " 27. Cut open two nests which were found on the 14th. One which the birds were then excavating, was smoothly finished to-day, but there was no nest and no pitch. To the other the female was carrying bark on the 14th; this nest was finished to-day but contained no eggs and had but little pitch. Both birds, however, were there, and both were bringing pitch and plastering it on the bark below the hole. I watched them a long time. They brought it on the tips of their bills in little globules, alighted against the lower edge of the hole, and then tapped it on in various places as low as they could reach, but without shifting their foothold. June 3. Nest composed of fine [illegible] strips of soft, inner fir bark. 1882. Oct. 8-22. Abundant during the early part of my stay and seen sparingly up to its close (I shot one October 21). One or two--rarely more however--were always to be found in a "mixed flock". 1860. May 20. Nest in a tall, very rotten ash stub at least fifty feet above the water. We were obliged to cut down the tree. It broke off at the nest when it struck and all the eggs but one were destroyed. As usual there was a heavy coating of pitch about the hole; eggs incubated about six days. 56