Only rarely are they a chronic pest problem. Like other arachnids, pseudoscorpions have 8 legs. Unlike scorpions, pseudoscorpions are very small, usually less than 5 mm long, and they have no sting on the end of their flat, oval abdomens. Natural habitats for pseudoscorpions include under leaf litter and mulch, in moss, under stones and beneath tree bark. They have also been reported in bird nests and between siding boards of buildings.
Pseudoscorpions are predaceous and therefore beneficial.
They feed on other arthropods, particularly small insects and mites. Special treatments for control of pseudoscorpions are usually not warranted. Only in a persistent infestation should control be attempted. It would be difficult to prevent all invasion by pseudoscorpions but sealing gaps, cracks and other points of entry may help exclude them. It may or may not apply in your area.