Males and females are similar, except the males have a smaller abdomens. The white pattern patches can be variable. Body length up to 4.5mm.
They feed on small invertebrates.
They reach maturity in the summer, although the females maybe found throughout the year. Usually found around human habitation, on walls, windows and doors, fences and in outbuildings and houses. Also found under stones, and on tree trunks and fence posts. Locally common and widespread in England and Wales.