I have had my sights on this really big dead tree for awhile now. I'm having a house warming party soon and need wood for the bonfire. Well today I headed back in the woods to drop that big old tree and was stopped dead in my tracks when I saw dozens of these insects on the tree that I wanted to get ahold of. Now I'm not afraid of bugs but some of these critters are @ least 10" long from front of head to the tip of their whatever it is on the end of them. All the bigger ones where apparently laying eggs inside the tree but there where smaller ones that would land for a few seconds then just fly away. I've lived all over the country but have spent most of my life here in michigan and have never seen anything like this. Here are some pics, anyone have any ideas?