The Hobo spider is grayish brown with herringbone or chevron patterns on the abdomen. It's underside, a light tan center with dark surrounding bands. Legs are brownish yellow with no stripes. It ranges from 1 to 1¾ inch, including legs. The hobo spider is also called the aggressive house spider and is very common in the Pacific Northwest. Hobo spiders construct a funnel-shaped web, preferring outdoor areas such as, cracks between bricks or under wood piles, stones, or vegetation. Inside our homes or structures they are built in dark, moist areas such as basements, window wells and under low lying furniture. Indoors, they are usually found in basements or ground floor levels. Usually painless, but do indeed bite. Within 15 minutes a burning sensation and reddening may occur; then the bite area enlarges, and within 3 days blisters may form. The spider’s venom is strong enough to cause considerable local pain and a severe allergic reaction in some people.