Pesticides are not recommended because cellar spiders are beneficial, and each spider would require direct application of the pesticide. The abdomen of the cellar spider is three times greater in length than width and cylindrical in shape. Including the length of the legs increases the total length of the body by more than six times. If cellar spider activity is observed indoors, remove spiders and egg sacs from the building and place outdoors or simply vacuum. Longer than most other spider species, the cellar spider ranges from 7 to 8 mm in length, not counting the legs. Remove clutter which can serve as a hiding spot for spiders. Lower the relative humidity through dehumidifiers and proper ventilation in the areas where cellar spiders are found indoors. To prevent spiders from entering homes and buildings, seal the foundation, inspect any window or door screens for holes, reduce clutter from around the foundation, and reduce any potential food sources for the spiders to keep them from entering or growing high numbers within the facility. Pholcid spiders are also known as cellar spiders or daddy long-legs spiders which is very confusing as this name is also shared with harvestmen, which look like. In high population levels, their extensive webbing can be a nuisance. Cellar spiders do not do this they simply add new webbing to old ones. Many other spiders eat their old web before producing new ones. However, in very high populations, they can be considered a pest in a building. Cellar spiders are beneficial because they feed on other insects. These spiders do not bite people or pets. Adult cellar spiders live about two years.Ĭellar spiders are not economically or medically important spiders. It usually takes a year for the adult to develop from the egg. After the spiderlings hatch, they crawl onto the mother’s body and stay there for a short time. Rather than attaching the egg sacs to their bodies, females carry them in their mouthparts. The eggs sacs contain approximately 10-60 eggs each. They can be found in heated buildings throughout the year.įemale cellar spiders produce about three eggs sacs over a lifetime. Indoors, they are often found in damp cellars, basements, crawl spaces, garages, and dark, quiet places. Close-up view of a cellar spiderOutdoors, cellar spiders are found in naturally protected areas like caves and rock piles.
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