In 1937 Beamer[1][1] published a review of the Genus Osbornellus in the United States and Canada. In that paper he recognized two red-banded species both of which had formerly been placed under the specific name auronitens . The southern form he named rotundas and designated its distribution as the southeastern United States and the Atlantic coast north to Connecticut. The distribution of auronitens was defined as the northeastern United States but extending as far south as Virginia and North Carolina and as far west as Kansas, Oklahome and Minnesota. A study of the material at hand indicates that there are three distinct species instead of two. The third species is described under the name of limosus and is associated with the bog and swamp plant associations. It is apparently eastern in distribution and has been taken in Tennessee, Virginia, New Jersey, Pennsylvania and Quebec in bog and swamp habitats. In appearance it most closely resembles auronitens but in male genital characters it most closely resembles the southern form. The style of limosus is unique in that it bears a pointed tooth on the inner margin of each style near the apex. The aedeagus is the same general type as rotundas but the whole process is larger and the lateral blades are more broadened, tapering to sharp pointed apices. The female segment is also different from either of the two described species. [1]: #fn-1