After the removal of the Strongylogasterinœ, which, to a certain extent, from a connecting link between this family and the Tenthredinidæ, but which, on account of their elongate shape and their cephalic and abdominal characteristics, I have placed with the latter family rather than retain here, there need be no difficulty in separating the Selandriidœ from all the other families by the characters made use of in my table.