Location: northern wisconsin
August 28, 2010 12:35 pm
just wanted to know what this is
This is a Pigeon Horntail, Tremex columba, one of the non-stinging Wood Wasps whose larvae bore in wood. The female Pigeon Horntail in your photo is in the act of ovipositing. She uses her stingerlike ovipositor to deposit her eggs in diseased wood where the larvae live and feed. We have gotten some nice recent photos of Giant Ichneumons, which are the primary predator of the Pigeon Horntail.