Subject: What’s this bug?
Location: Spring Grove, Pa (south central PA)
September 24, 2014 5:25 pm
We found several of these in a pile of firewood in our backyard. They have bored many holes in the logs.
This Giant Ichneumon in the genus Megarhyssa is commonly called a Stump Stabber. The female lays her eggs in wood that is infested with the wood boring larvae of Wood Wasps and the larval Stump Stabber parazitizes the larvae of the Wood Wasps.