Physical Characteristics

Cellar spiders have extremely long, skinny legs with small bodies that are usually tan or gray. In California, they’re known as “daddy longlegs” spiders (in other places, “daddy longlegs” refers to other arachnids) or “skull” spiders, from, the skull-like appearance of the spider’s body.. The web of a cellar spider is usually very messy, similar to the web of a cobweb spider. Like all spiders, cellar spiders have eight legs, two body parts, and fang-like mouthparts. The body length of adult cellar spider is about 1/4 inch or less.

Cellar Spider

Cellar Spider

Behavior

Cellar spiders are usually found in dark corners of cellars, crawl spaces, and garages. They construct loose, irregular, even messy webs, and it’s their active and extensive web-spinning that makes them more of a nuisance than anything else. They seem to like a more humid atmosphere, perhaps because the insects they feed on prefer humid air. When disturbed, these spiders characteristically will shake their bodies rapidly, vibrating their webs.

Treatment

Sweeping away accumulated webbing and lowering relative humidity are two ways to control cellar spiders. As part of Clark Pest Control’s Pest-Away® service, we will remove cellar spider webs when we find them.

Latin name: Pholcus phalangioides, et al.