sac spiders

May 3, 2010 by  

Sac spiders

Sac spiders are yellow in color and build a sac like structure where they hide in the daytime. There are only two species of sac spiders in the U.S. but it is thought that they are responsible for very high percentage of spider bites inside homes. It is not known if the bites can become serious. They are about 4-10 mm in size.

            Bites are generally when the spider is disturbed in bedding or clothing but it is thought that they will also bite when unprovoked. They will be found in corners of ceilings and walls of basements and all over the house. Sac spiders are a nuisance and should be treated with insecticides when large numbers are present in homes. They will be found outdoors and indoors throughout the season

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