![]() Reduction of outdoor lighting or changing white light bulbs to yellow will help to attract fewer night-flying insects and thus reduce the spider populations. Reduction of other insects in and around a home will reduce the food available to the spiders, and removal of debris and lumber piles will help to reduce harborage sites. Sweeping is not likely to kill the spiders, but pyrethroid insecticides provide excellent knockdown and control. Sweeping of webs to remove them is an important step in cellar spider control, as these spiders do not reuse their own silk, and the webs continue to accumulate. There may be either 6 or 8 eyes, depending on the species, and the outer 3 eyes on either side of the head are arranged in a close triangle. The color is a yellowish brown and the legs may be as long as 2 inches. The female creates an egg mass of about a dozen eggs, and holds it in her jaws until the eggs hatch.Ĭellar spiders are easily identified by their extraordinarily long and thin legs, which are attached to their elongate and thin body. ![]() These spiders have been known to feed on black widow spiders. Holocnemus pluchei, commonly known as the marbled cellar spider, is a species of Pholcidae, a family commonly referred to as cellar spiders or daddy long. They hang upside down on their webs, and when disturbed they will begin to shake and bounce the web noticeably, or they may drop off the web and run to hide. Their long legs make them very clumsy when attempting to walk. ![]() Webs typically appear under the eaves of roofs, around porch lights, within garages, and indoors around windows where the light may draw small insects that the spiders feed on. Their primary crime is the messiness of their webs, which are thin and flimsy but tend to gather dust and floating debris, as well as the remains of the insects the spiders have fed on. The cellar spiders are incapable of biting humans and are harmless to us and our pets. They look very much like the cellar spider and are commonly confused. Instead, they are distant relatives of the spider. However, harvestmen are not actually spiders. We’ll still include them on the list here because they look like spiders and everyone associates them with such. However, the true Daddy Long-legs is another animal entirely, called the Harvestman. Harvestmen, or daddy long-legs, are not actually spiders at all. The cellar spiders are often called “Daddy Long-legs” due to their very long, thin legs. Several dozen species of Pholcids are native to North America, with the three species listed above the most common to be found in and on structures.
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