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.
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.