Daddylonglegs

The common name cellar comes from these spiders being found frequently in dark and damp places such as cellars, basements, and crawl spaces, and that of Daddylonglegs from their very long, thin legs which give them an appearance somewhat similar to harvestment/Daddylonglegs. Cellar spiders are nuisance pests, probably more because of their webs than the spider itself. About 20 species are found in the United States and Canada.

Recognition

Adult body length ranges from about 1/16-5/16 inch Cephalothorax and abdomen connected by tiny waist but appearing as small body with very long, thin legs. Color usually pale yellowish to light brown or gray. Usually with eight eyes, some species with six, usually with two widely spaced groups of three closely spaced eyes each and two eyes in between. Chelicear fused at base, cheliceral claw short and opposed by a short toothlike projection of basal segment. Abdomen either bulbous or elongated. Tarsi with three claws each.

Habits

Cellar spiders construct loose, irregular webs in corners. They hang upside down on the underside of the web. The webs are not cleaned but instead new web is continually added. This habit can result in extensive webbing in a relatively short time.

Webs commonly are found in dark and damp places such as cellars, basements, and crawl spaces. They also can be found in the corners of garages, sheds, barns, and warehouses, on eaves, windows, and ceilings, and in closets, sink cabinets, and bathtraps. In commercial buildings and warehouses, these spiders tend to be in corners near doors which are left open. Open doors allow many flying insects to enter, which means more food.

Cellar spiders seem to fare better in areas with higher relative humidity. The higher RH may be due to older construction. Improperly vented crawl spaces, excessive ground moisture, improperly sealed basement walls, leaking/sweating plumbing pipes, leaky flashing, roof problems, etc. are common habitats. This increased RH attracts and help support insect prey.