Tegenaria is a genus of fast-running funnel weavers that occupy much of the Northern Hemisphere except for Japan and Indonesia. It was first described by Pierre André Latreille in 1804, though many of its species have been moved elsewhere. The majority of these were moved to Eratigena, including the giant house spider (Eratigena atrica) and the hobo spider (Eratigena agrestis). They can be difficult to identify because they resemble wolf spiders and other funnel-web spiders in their area, unless found in an area where they don't occur naturally. They live on sheet webs, usually stretching across the corner between two walls. They have eight eyes in two straight or almost straight rows. Size varies from one species to another, but the body length of adults can range from 10 mm to 20 mm, not including the legs. The cardinal spider is the largest funnel weaver, with females that can grow up to 18 mm long.