The hobo spider generates a lot of concern — some of it warranted, some of it exaggerated. It’s been associated with necrotic wounds similar to brown recluse bites, leading to widespread fear in areas where it lives. The science on hobo spider venom has evolved significantly over the past two decades, and the actual medical picture is more nuanced than early reports suggested. Here’s an honest look at the hobo spider: what it is, where it’s found in the Midwest, and how to tell it apart from other brown spiders.

Identification

Hobo spiders (Eratigena agrestis, formerly Tegenaria agrestis) are medium-sized brown spiders, 1/2 to 3/4 inch in body length. They’re uniformly brown with a distinctive chevron pattern on the abdomen — a series of V-shaped markings pointing toward the head. Legs are lightly banded. The abdomen has a slight herringbone pattern that’s visible under magnification.

They build funnel-shaped webs — flat, sheet-like webs that funnel down into a tight tube where the spider retreats. This funnel web structure is the most reliable field indicator. Brown recluse (a different species that does have medically significant venom) builds irregular, off-white webs and has a distinctive violin-shaped marking on the cephalothorax.

Where Hobo Spiders Are Found

Hobo spiders originated in Europe and established in the Pacific Northwest. Their range has expanded eastward and includes parts of the Midwest, particularly in areas with suitable habitat. They prefer ground-level environments: under wood piles, debris, in basement corners, and in crawl spaces. They’re poor climbers and rarely found on walls or ceilings.

In Iowa, Nebraska, and Missouri, hobo spiders are less common than in the Pacific Northwest states but have been documented. Many suspected hobo spider sightings in the Midwest are actually other funnel-web species or brown spiders that look similar.

The Bite Controversy

Early case reports linked hobo spider bites to necrotic lesions. More recent research — including studies by the CDC — has questioned whether hobo spider venom actually causes necrosis in humans. The scientific consensus has shifted; many earlier cases may have been misidentified wounds or infections. That said, hobo spider bites can cause local pain, redness, and swelling. Anyone bitten by an unknown spider who develops worsening symptoms should seek medical attention.

Prevention

  • Remove debris, wood piles, and ground-level clutter from around the foundation
  • Seal gaps and cracks at ground level around the foundation
  • Use sticky traps in basement corners to monitor and capture wandering spiders
  • Wear gloves when handling stored materials in basements and garages
  • If you find a spider you believe is a hobo spider, capture it in a jar for professional identification

When to Call Miller Pest Solutions

If you’re finding funnel webs in your basement or crawl space, or are concerned about spider species in your home, professional identification and treatment makes sense. Miller Pest Solutions provides spider control throughout Des Moines, Omaha, and Kansas City, and can help identify the species you’re dealing with. Call for a free phone bid: Omaha (402) 769-0997 | Des Moines (515) 329-8801 | Kansas City (816) 815-0498