Giant ichneumon wasp

7329.         These have been showing up in my basement this winter, at least 20 so far. Benoit’s Cove, NL. Canada

Number 7329.      This is a giant ichneumon wasp (Hymenoptera: Ichneumonidae) in the genus Megarhyssa. They are parasitic on the larvae of wood wasps (Hymenoptera: Siricidae), using their long ovipositor to bore into the tunnels made by the wood wasp larvae where they will deposit their eggs. They lack venom and are harmless to humans. See Giant ichneumon wasp detailed information  & Giant Ichneumon Wasp Life History