Can you identify this?
We recently found this bug in our yard while burning some trees that had blown down. It appeared they were laying eggs in the loose bark of one of the trees. It looked at if one was laying the eggs, and the other one might have been using the long "antenna" to fertilize the eggs.
Female Giant Ichneumons in the genus Megarhyssa use that long, stingerlike ovipositor to place eggs deep in wood that contains their food source, wood boring grubs. They are related to wasps, but do not sting and are harmless.