Pretty sure this is a carpenter beetle larvae

***Update*** Maybe Trogoderma granarium here is the description given and warning website to report any sightings:

http://entnemdept.ufl.edu/creatures/urban/beetles/khapra_beetle.htm


Okay, a month or so ago I found a struggling tarantula. He was so dehydrated and malnourished that I put him in captivity to see if I could help him stay alive. It did not look like an older spider so I thought maybe it was just having a rough time eating. I have raised a tarantula several years ago and had a pretty good idea as to what to try. Well the spider died that evening but I kept his body anyway. Today I decided to clean up his tomb and noticed a small hole around his abdominal area. Well curiosity got the better of me so I opened it up and this is what I found. Alive and well. I first thought maybe it was a larva stag of a tarantula hawk. They are a parasitic egg layer which eventually does kill the host by eating its heart and other organs. The problem with this theory is that is only take 2-3 weeks for full mutation into a wasp so this can not be the case. My other thought is that something completely different was just feeding on it post death. If this is the case I still don't know what it is. By imaging I found on-line it certainly is not a tarantula hawk larva.