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IchneumonsWood boring bug?
Dear Bugman,
I am interested in finding out what this bug is. Our local elementary school science teachers cannot name it. We found it in Northern Lower Michigan in the fall. Around the Lake City area. I have looked at ALL of the bugs on your website but have not seen this one. Please help.
Thank you.
Robert E.

Hi Robert,
Look again because we have an entire page devoted to Ichneumons. This is a Giant Ichneumon, Megarhyssa atrata. It is not a wood boring insect, but a parasite on wood boring grubs. The female, which you have photographed, uses her long ovipositor to lay eggs deep inside wood infested with horntails and other boring insects.
Related Posts
- Giant Ichneumon (July 9, 2006)
- Giant Ichneumon (October 11, 2004)
- Giant Ichneumon (June 14, 2008)
- Giant Ichneumon: female of the species (July 31, 2009)
- Giant Ichneumon (September 19, 2009)





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