Hobo Spider

The hobo spider (Tegenaria agrestis) is a member of the genus of spiders known colloquially as funnel web spiders, but not to be confused with the Australian funnel-web spider.
Hobo Spider

Hobo Spider

It is one of a small number of spiders in North America whose bites are generally considered to be medically significant. Individuals construct a funnel-shaped structure of silk sheeting and lie in wait at the small end of the funnel for prey insects to blunder onto their webs. Hobo spiders sometimes build their webs in or around human habitations. This species of spider has a reputation for aggressiveness, due to its poor eyesight. They will normally avoid contact with humans unless accidentally crushed or squeezed. The spider's venom is strong enough to cause considerable local pain and, possibly, necrosis.

       Domestic House Spider

The key for controlling the domestic house spider is to look for webs and remove them, making sure a treatment is applied into any crack associated with a web to be sure the spider has been killed.
House Spider

House Spider

Steps that should be taken to prevent new spiders from entering include:

Removing or limiting heavy, ground-covering vegetation near the building. Sealing cracks and holes in the building s exterior. Installing tight-fitting screens on all attic and foundation vents. Sealing holes around pipes indoors to prevent spiders from entering the living spaces of the home by following plumbing lines in basements and crawl spaces.

Where numerous spiders are seen, a professional should be consulted to conduct a thorough inspection and recommend possible treatments.

       Brown Recluse Spider

DESCRIPTION The brown recluse spider (Loxosceles spp.) is a poisonous spider that is light brown in color.  It is about 1/2 inch in length, has a violin-shaped marking on the thorax (mid-section)  and is sometimes called a fiddleback spider due to the unique markings.
Brown Recluse Spider

Brown Recluse Spider

While most spiders have 8 eyes, the brown recluse has 6 (3 pairs). The brown recluse spider received its name because of its color and reclusive behavior.  These spiders make an irregular and sticky web that is used for shelter rather than for trapping insects.   BIOLOGY There are seven species of brown recluse spider that are a health concern in the United States.  Though active throughout the year, they often go unnoticed because of their reclusive habits.  Adults may be found in dark, secluded indoor places that are dry, cluttered, undisturbed and contain a supply of insects for food.  They are most commonly found behind baseboards, under tables and chairs, in the basement, crawlspace, attic, infesting cedar shake roofs, and in garages and sheds.  Another common hiding place for a brown recluse is in garments that are left hanging undisturbed for some time and in the linens of beds that have been unoccupied for a long while.  Bites often occur when the spider is trapped in shoes or clothing, rolled on while in bed, and encountered when cleaning storage areas.   The brown recluses venom is a cytotoxin that attacks the cells of flesh and produces necrosis or dead tissue in humans.  Though fatalities from the venom are very rare, the reaction to the venom depends on the amount of and individual sensitivity to the toxin.  The bite is not usually felt, but a stinging sensation may develop shortly after, followed by intense pain.  The reaction, however, may not occur until an hour or more after the bite.  The bitten area will first develop a small, white blister and enlarge to the size of a silver dollar as the venom attacks and kills the tissue in the affected area.  Eventually, the affected tissue will die and leave a sunken, ulcerated sore.  The healing process is slow, generally six to eight weeks.  If bitten, call a physician or go to the emergency room immediately.  If possible, exterminate the spider and take it along for identification purposes. Though no antitoxin is available, prompt medical treatment can prevent severe reaction and minimize the extent of damaged tissue and eventual scarring.   SOLUTION To avoid getting bitten by the brown recluse, shake out unworn or stored shoes and clothes before wearing, check bed linens of unoccupied beds and wear leather gloves when working around potential habitats.  Use caution around spider webs in basements and crawlspaces.  If a brown recluse is encountered, contact a pest control professional.