Certhia familiaris americana. Lake Umbagog. Maine. 1879. " 18. A female at work upon an unfinished nest. " 19. Set C-4. -- Fresh--under bark scale--fir--female sit ting--found June 14 when it contained one egg. The fe- male sat very closely and flew about my head as I was taking the eggs, coming within a few inches. 1879. (June 23) Set D-4. --Fresh--bark scale--dead fir--height twelve feet--birds absent--tree standing in water among hard wood stubs. This nest was found June 18 when the female was at work upon it; the first eggs must have been laid the next day. 1880. May 17. Numerous males singing. " 18. Singing every where in the woods. " 21. A nest with young at least five days old in bark scale over water; height four feet. " 24. Nest just finished. " 25. Set E-6. -- Nest in scale of fir bark; height eight feet; tree surrounded by water; female sitting; upon prying off the bark I found her clinging against the trunk about six inches above the nest; she then flow off and at once disappeared. " " Set F-6. -- Fresh--fir--height seven feet--tree standing on lake shore among stubs; nest near the top of an immense scale of bark at least four feet long. Upon tapping the bark the female came out and at once disappeared. " " Set G-5. -- Hemlock; on high bank bordering lake partly shaded by the woods. None of the materials of the nest could be seen from below. Height eight feet; male singing about twenty yards off, female feeding with him; when I climbed to the nest she flew about my head uttering her shrill tzeeop and showing much solicitude. " 27. Set H-7. -- Fresh--height six feet; tree standing in shallow water just outside edge of woods; female sit- ting; she flew from the nest when we tapped on the tree.