Pseudeuophrys erratica is a species of jumping spider (family Salticidae) that is distributed throughout Europe, although it is not common. P. erratica is normally found under the bark of trees or under rocks on forest fringes. The very similar looking P. lanigera is much more abundant, and is almost only found in or near buildings.

There is no data about harmful of this species. Don't forget to be careful.

Males reach a body length of three to four millimeters, with females up to five mm. Adults can be found in spring and summer, females also in autumn.

P. erratica has a widespread distribution across Europe and Asia, and has been introduced to the United States. In the United States, it has been reported from Connecticut, New Jersey, New York, Massachusetts, Oregon, Pennsylvania, Rhode Island, and Vermont.

- Diagnostic drawings of P. erratica