Certhia familiaris americana. Lake Umbagog, Maine. 1881. May 14. Watched one building in a strip of bark on maple, and during the day found two other new, but unfinished nests. " 25. Set P-6. -- Fresh--fir--height twelve feet. Tree standing in shallow water on the lake shore. " " Set Q-6. --Fresh--fir--height five feet. " 27. Set R-5. -- Ash stub standing in the water; height five foot; incubating a few days; female sitting. When I pried off the bark she climbed up above the nest and clung there, evidently much frightened. " 27. On the 14th we saw a Creeper carrying building ma- terials behind a scale of bark. We approached rather too near when she dropped her load and eyed us suspiciously. To-day we found that nothing had been done to this nest since our former visit; we examined it carefully, how- ever, and its position merits description: The tree was a large rod maple standing in the water and perfectly dead. The bark had simply cracked in a long narrow slit and held fast both top and bottom. The space within was very narrow I have never seen a Creeper's nest before on a maple; nor have I seen one in a bark-scale which was not separated from the trunk below. (May 28) Set S-6. Fresh. Fir stub standing on the edge of the woods in the water; height five feet; nest behind an enormous scale of bark. The female not sitting but as we were taking her nest she came with her bill fair- ly vrammed with fine bark, which she was evidently about to work into the nest. The latter, however, was unusu- ally deep, and elaborate. " 29. Set T-6. Fresh. Hemlock standing on the Lake shore; height eight feet. This nest contained two eggs May 26.