Among various aquatic beetles taken by the author in Emmet County, Michigan, in 1952, was a series of an unfamiliar haliplid beetle. These were determined as a new species of Brychius, a small genus of rare haliplids previously reported only from British Columbia, Alberta, California, Oregon, and Utah. In addition, specimens from Montana and Colorado have been examined by the author. Specimens of the new species were sent to Mr. Hugh B. Leech of the California Academy of Sciences, who concurred with the author’s determination.