Insect and Spider Identification: Larva, but of what?, 0 by WayuU

WayuU wrote:
This was shot two days ago, in the Alicante area of Spain, close to the mountains.
It's a larva, but of what?
I have some ideas but want to keep them for myself for now. I got no idea on the species though, just the genus.
It's 1.5cm long, stretch out, and was found walking around on the ground. The soil is, as usual with my Spain photos, very arid and hard (whitish color ground).
This creatures body is of a leathery soft skin that seems to be too big for him, which I guess means it's going to feed itself much larger in body size. Touching it feels like thin skin pouch.