Among Hymenoptera which I sent to Provancher in 1855 was a sawfly which he determined as Nematus malacus, Nort. As it did not correspond to the description of that species, it was set aside with some undetermined material. While rearranging my Nematidæ, I recently examined the insect to ascertain its position, and found that it had simple claws. As it has not the appearance of Gymnonychus, I was somewhat puzzled until, on examining the wings, I found the lanceolate cell was widely contracted as in the subfamily Cladinæ, instead of petiolate as in the Nematinæ. The insect, therefore, must be placed in the genus Anoplonyx, which Marlatt has separated from Camponsicus, which has bifid claws. As no representatives of these genera were known to Marlatt when he published his Revision of the Nematinæ (Technical Series No.3; Dept. Agric, U.S., 1896), the following description of this Canadian form is submitted: