Empidonax flaviventris. Maine (Lake Umbagog). 1871. May 30- June 10. Took five specimens during our stay, these were all that were seen. They were found in dense, gloomy arbor- vitae swamps where their presence was usually betrayed by their low pco-o. Mr. Maynard also heard both sexes singing; their note sounded to him like the word killink. Any sudden noise, such as the cracking of a branch or the report of a gun, seems to excite rather than to alarm them and frequently on such occasions they will fly to the spot as if impelled by curiosity. 1872. June 3- 14. Found generally throughout the arbor-vitae swamps but rather more numerous in the willow and viburnum thick- etsbordering Cambridge River. What seems to be the song of the male is a short, feeble sl-at which appar- ently corresponds to the chelat of the Least Flycatcher. 1873. Aug. 29. Heard a number to-day in the swampy woods bordering Cambridge River. 1874. Aug. 3. Two young just from the nest were sitting side by side on the branch of a viburnum overhanging Cambridge River, uttering a juvenile version of the sl-at of the adult. 1876. June 14. Very abundant along the Tyler road the males sing- ing everywhere. The song is like that of the Least Fly- catcher in tone, but in general character perhaps more like the sl-ip of Henslow's Bunting. It may be closely imitated-by the syllables sl-at with the accent on the last. 1879. May 29. About six heard along Cambridge River. The song may be best described by the word: chebec, though it dif- fers from the chebec of E.minimus in being feebler and hoarser. June 14. The song note is ch-lat. 1880. May 20. Several. 1881. May 18. One, the first this year.