Petrochelidon lunifrous. Lake Umbagog, Maine. 1895. But the most interesting sight was that of a flock of at Sept.5. least seventy or eighty Swallows which were skimming about over the open marshes. I detected one Bank Swallow and three or four Barn Swallows among them but practically the whole swarm was made up of Eave Swallows. Faxon tells me that this species has been unusually abundant in Mass. this year. It would seem to have increased greatly here as well for I never saw anything like so many about Umbagog before and I have rare- ly seen it at all so late in the season.