Hydrochelidon m. Surinamensis. L. Umbagog, Maine. Hydrochelidon Aug 18ᵗʰ 1874 Lake Umbagog, Maine. Hydrochelidon surinamensis 1895. September 8 juv flying over marshes at Outlet swooping down to the ground rising again like a playful Sharp-shinned Hawk. 1874. Maine (Lake Umbagog). Aug. 18. Four flying about over the Lake near the Outlet. Their flight was peculiar and distinctly unlike that of other Tern, resembling more a Swallow's or a Petrel's. They kept for the most part rather high in air, frequent- ly hawking about two or three hundred feet above the wa- ter, apparently catching insects. At other times they would fly steadily along with heads depressed seemingly searching the surface of the lake. Occasionally one would sweep down to the water like a Gull, but in no instance, during an hour's observation, did I see any of them actually touch the surface. They appeared nearly black and reminded me of Nighthawks. The only note heard was a shrill, but feeble kee-oh, keen. I shot three of them. One survivor hovered over its dead companion, after the usual manner of terns. The stomachs of those killed were filled entirely with insects, chiefly grass- hoppers with a few Coleoptera and diptera. Both were fat but their bodies emitted none of that peculiar salty smell characteristic of marine species. 86