What are that for caterpillars or maggots?

2021-08-30 21:04:21 CLIFTON


have just brought any earth from our large compost heap for my flowerpots and I noticed these caterpillars or maggots in the earth. They are about 20 cm deep.

If you happen to be some of you what this can be for which?

They remind me of beemaden, but their structure is too tight and they do not put their magazines in the compost ...

Thank you for answers