In Vol. i.,No. 3, page 20, of the Canadian Entomologist, I published a description of a larva found infesting the seed of the grape, and in the Canada Farmer for October 15, 1868, page 316, a fuller description of its habits and destructive powers, and ventured the opinion that it would probably produce, when mature, a small curculio. In this I was in error, for the perfect insect proves to be Hymenopterous, a small four-winged fly belonging to Isosoma, and as it is believed to be undescribed, I propose for it the name of vitis (Isosoma vitis, n. sp.). The following notes on its history were made subsequent to the date of the issue referred to.