Mark Sturtevant wrote:
Lots of nice, dedicate details are visible in this one. Well done.
June bug larvae tend to be in the turf, along with the similar but smaller Japanese beetle larvae. Other Scarabeid larvae would be in rotting wood. Bess bug larvae might also be in wood, but I am not sure if their larvae are Scarabeiform.
This looks very much like a Bess Bug grub. Yes, they are scarabs. It may not be, but good chance. Wood and woods dwellers.