I found this beetle larva in an old vine trunk that had been sitting on the soil for some time. I think it's a cockchafer (Melolontha melolontha).

Impressively big!!!

A photo of the female adult is here:
https://en.wikipedia.org/wiki/Cockchafer#/media/File:Hanneton_commun_(Melolontha_melolontha)_%E2%99%80,_Parc_de_Woluw%C3%A9,_Bruxelles_(51222810874).jpg

#Beetles #Coleoptera #Grubs #PotentialGrossOut