This increased RH attracts and helps support insect prey. 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. Open doors allow many flying insects to enter which means more food.Ĭellar spiders seem to fare better in areas with higher relative humidity (RH). In commercial buildings and warehouses, these spiders tend to be in corners near doors which are left open. They can also be found in the corners of garages, sheds, barns, and warehouses, on eaves, windows, and ceilings, and in closets, sink cabinets, and bathtraps. Webs are commonly found in dark and damp places such as cellars, basements, and crawl spaces. This habit can result in extensive webbing in a relatively short time. The webs are not cleaned but instead new web is continually added. They hang upside down on the underside of the web. HABITSĬellar spiders construct loose, irregular webs in corners. The short-bodied female cellar spider produces a similar egg sac containing 10-27 eggs each, and also carries it in her chelicerae. There are 5 molts before maturity is reached, and this usually requires about I year. The emerging spiderlings often cling to their mother for a short time. The female typically carries the egg sac between her chelicerae Oaws) until they hatch. The sacs are very thin such that the cluster of eggs shows through, giving the appearance of an unripened blackberry. ![]() The long-bodied female cellar spider may produce up to 3 egg sacs containing 13-60 eggs each. Adult female body length about 1/1 6" (2 mm) with front legs about 5/16" (8.5 mm) long, male body length about 1/16" (1.6 mm) with front legs about 3/8" (9.5 mm) long cephalothorax pale yellow with 2 light gray spots, abdomen pale yellow with 6 eyes in 2 lateral groups of 3 each abdomen globose found in eastern United States.
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