Only the males leave their home burrow to search for mates. These males must find their way back to their burrow, use another scorpion's burrow, or construct a new burrow every night. They will often dig shallow burrows under any available shelter, e.g., rocks, logs, sleeping tourists, and the like. It is very difficult to characterize these scorpions as to morpholoical adaptations because there are so many different types from different taxonomic families. However, I find that these are over-generalizations that owe as much to phylogenetic affinity as they to to digging behavior.
Many psammophilous species have fossorial relatives.
Psammophilous species often have elongated tarsal claws and setal combs on their legs. But if you are to include all species that actively move about during foraging, then this category is large and universal indeed. I consider errant scorpions to be those that routinely use only pre-existing objects for their retreats, perhaps cleaning and enlarging the shelter. Scorpions in this category may be crevice-dwelling generalists, e.g., bark scorpions like Centruroides ssp., which will use any kind of crevice for a retreat, or they may prefer only certain types of crevices. Some species are capable of burrowing, e.g., Liocheles australasiae , but are normally found in crevice environments.