About Megarhyssa atrata (Fabricius, 1781)
Megarhyssa atrata, commonly called the black giant ichneumonid wasp, is a species of large ichneumon wasp. This species is recorded from North America; within the continent, its range extends from Quebec, Michigan, Ohio, Connecticut, and North and South Carolina down to Florida. Adult black giant ichneumonid wasps fly from May through July each year.