This is the common small Lithobius (to 17 mm) with projections on tergites 9, 11 &13. It is usually pale brown in colour, with an indistinct darker longitudinal dorsal stripe.
Guidelines on how to distinguish the common Lithobius melanops from the much more restricted Lithobius tricuspis are given by Barber & Gregory (2019).
Distribution and Habitat
This species is very common throughout Britain and Ireland, both inland and on the coast. It is typically found in drier places, often above ground under bark on trees and on walls, but may also occur at ground level.