Before leaving the Canadian Chalcidiæ, in hope of returning to them when many more genera are discovered in Canada, I will mention Megastigmus, which very probably occurs there; it is a genus of Torymidæ, and, in some respects, connects that family with the Eurytomidæ, and is next to the latter in the interest with which it may be regarded in case there is a foundation for the report lately published concerning the seed-eating habits of the species which represent it in California.