The genus Gonia is one easily recoginzed by reason of its peculiar structure of the head and antennæ unfortunately the separation of species is a much less simple matter. As is so frequently the case, isolated specimens frequently furnish grounds for much more decided opinions that a richer mateiral will sustain. I describe in the present paper five species that present characters sufficiently decisive to render their recognition not doubtful; other species I forbear to namy till my material is richer.