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Pest Guide: Spiders

   

American House Spider

(Parasteatoda tepidariorum)

The American house spider is an extremely common spider that is fairly likely to escape notice since it tends to build its tangled web in secluded locations. Its behavior on its web is quiet and efficient, so it generally does not draw attention to itself. There are several species of this genus, Achaearania. Their coloration consists generally in patterns of shades of brown, and they are rather dull in appearance, all of which makes it more easy for them to slip into the background. They are not known to bite people with any high degree of frequency, and their venom is not known to be dangerous to human beings.

Black Widow Spiders

(Lactrodectus mactans)

Black widow spiders are most recognized for the red hourglass shape under their abdomen. Contrary to legend, female black widow spiders rarely devour the male black widow spider after mating.

Brown Recluse Spiders

(Loxosceles reclusa)

Brown recluse spiders have a characteristic dark brown violin marking on their back.

Giant House Spider

(Tegenaria duellica)

Tegenaria duellica is commonly referred to as the "Giant House Spider," and for good reason, too: the leg span of the adult males can reach a good 4 inches in some cases! These docile spiders construct a funnel-shaped retreat with a radiating sheet of webbing where they sit and await prey items.

Hobo Spider

(Tegenaria agrestis)

The Hobo Spider and the Giant House Spider are both in the genus Tegenaria. They are very similar in appearance and live in the same environments. Both are large ‘hairy’ spiders and are funnel weavers that can be found in dark corners and recesses. They are common in basements and crawl spaces inside the home and under the siding and in rock walls outside the home. They have 1/2 – 5/8” bodies with leg spans reaching 3 inches. There is a distinctive ‘chevron’ pattern on the abdomen.

Wolf Spider

(Rhabidosa rabida)

Wolf spiders are members of the family Lycosidae. They are robust and agile hunters with good eyesight. They live mostly solitary lives and hunt alone. Some are opportunistic hunters pouncing upon prey as they find it or even chasing it over short distances. Some will even wait for passing prey in or near the mouth of a burrow. There are many genera of wolf spider, ranging in body size from less than 1 to 30 millimetres (0.04 to 1.18 in). They have eight eyes arranged in three rows. The bottom row consists of four small eyes, the middle row has two very large eyes (which distinguishes them from the Pisauridae), and the top row has two medium-sized eyes.

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