New Species - Giant Wood Wasp

I saw this striking insect ovipositing into the Larch planks we recently clad our barn with. Part of the idea of replacing tin sheets with untreated Larch was to provide some wildlife habitat so it was gratifying to see it put to use already. The Giant Wood Wasp (Urocerus gigas) is not a wasp at all but a Sawfly. They are in the same Order, Hymenoptera, as Ants, Bees and Wasps but have cylindrical rather than the waisted bodies seen on Wasps.