Getting rid of hobo spiders starts with removing the outdoor habitats they prefer, sealing entry points into your home, and using traps or residual insecticides to eliminate the ones already inside. These brown, fast-running spiders build funnel-shaped webs in dark, sheltered spots and are most likely to show up indoors during September and October, when males abandon their webs to search for mates.
Identifying Hobo Spiders
Hobo spiders are brown with a pattern of yellowish chevron markings on their gray abdomen, though this pattern can be hard to see without a magnifying glass. Females measure roughly 3/8 to 5/8 of an inch in body length; males are slightly smaller. One useful clue: unlike many similar-looking spiders, hobo spiders do not have dark bands on their legs. Their legs are uniformly brown.
The trouble is that hobo spiders look extremely similar to other funnel-web relatives, including the domestic house spider and the giant house spider. Even experts have difficulty telling them apart without examining reproductive structures under magnification. If you’re finding funnel-shaped webs in your basement, garage, or around your foundation, you’re dealing with a funnel-web spider of some kind, and the control methods are the same regardless of which species it turns out to be.
Their webs are distinctive: a flat sheet of silk that narrows into a tube or funnel at one end. The spider hides at the narrow end, waiting for prey to walk across the sheet. You’ll find these webs in wood piles, rock piles, retaining walls, tall grass, foundation cracks, and ground-level hiding spots both indoors and out.
Why They Come Inside in Fall
You probably noticed these spiders in late August through October. That timing isn’t a coincidence. September is mating season. Male hobo spiders reach adulthood in late summer and permanently abandon their webs to wander in search of females. When nighttime temperatures drop, they move indoors, which is why you suddenly find them in bathtubs, along baseboards, and crossing your living room floor in the evening. The spiders you’re seeing are almost all males on the move.
This means fall is both the most alarming time (more visible spiders) and the most important time to have traps and barriers in place.
Clear Outdoor Habitats First
The single most effective long-term strategy is making the area around your home less hospitable. Hobo spiders build webs at ground level in sheltered, undisturbed spots, so eliminating those spots cuts the population before it ever reaches your doors.
- Wood and rock piles: Move firewood, lumber, and stacked stones well away from your foundation. These are prime web-building sites.
- Tall grass and vegetation: Keep grass trimmed short near the house and clear dense ground cover, ivy, and leaf litter from the foundation perimeter.
- Retaining walls: Inspect retaining walls near the house for funnel webs in the crevices between stones or blocks.
- Ground debris: Remove old tarps, cardboard, unused planters, and anything else sitting directly on the ground near the home’s exterior.
Think of it as creating a clean, dry buffer zone between your landscaping and your foundation walls. The fewer hiding spots within a few feet of the house, the fewer spiders will find their way to entry points.
Seal Entry Points
Hobo spiders are ground-level travelers, so focus your sealing efforts low. Walk the perimeter of your home and look for gaps around the foundation, door thresholds, garage entrances, crawl space openings, and foundation vents. Use caulk to fill small cracks and gaps. For larger voids that caulk can’t bridge, copper mesh stuffed into the opening works well. Check window screens for tears and add brush or rubber seals to the bottoms of doors where gaps let spiders slide underneath.
This exclusion step matters more than any chemical treatment. A spider that can’t get in doesn’t need to be killed.
Use Sticky Traps Indoors
Glue boards are one of the most effective tools for catching hobo spiders that have already made it inside. These spiders are fast runners that travel along walls and edges, which makes flat sticky traps placed flush against baseboards highly effective. Place them in corners, along wall edges, behind furniture, and in basements, garages, closets, and storage areas where you’ve noticed activity.
Sticky traps serve double duty: they catch spiders and they tell you where the problem is concentrated. If one trap fills up quickly while others stay empty, you know exactly which area to focus your other efforts on. Check and replace traps regularly, especially during the fall mating season when male spiders are most active indoors.
Declutter Storage Areas
Hobo spiders gravitate toward cluttered, undisturbed spaces. Basements, attics, garages, and closets full of boxes and stored items provide exactly the kind of dark, sheltered environment they prefer. Tidying these spaces removes potential web sites and makes it easier to spot and trap spiders. If you have cardboard boxes on the floor, consider switching to sealed plastic bins raised off the ground.
Also worth noting: hobo spiders are in your home partly because other insects are. They’re hunting. If you have a bug problem (ants, flies, crickets), addressing that food source makes your home less attractive to spiders in general.
Insecticide Options That Work
When traps and exclusion aren’t enough, residual insecticides can help. Two approaches work well together: perimeter sprays outside and dust treatments inside.
Perimeter Spray
Apply a barrier spray around the outside base of your home, paying close attention to door thresholds, garage entrances, crawl space openings, foundation vents, and the bottom edge of siding. Products containing bifenthrin, cyfluthrin, deltamethrin, or lambda cyhalothrin are effective for spider control. These typically need reapplication monthly or every other month during warmer weather, since rain and sun break them down over time.
Dust Treatments
Insecticidal dusts are particularly useful in the crevices and voids where hobo spiders hide indoors. Apply dust along baseboards, window sills, and in cracks and gaps in basements, crawl spaces, and attics. The key is to apply a very fine layer, barely visible to the naked eye. A thick coating actually repels spiders rather than killing them. A bellows-style hand duster (available at hardware stores) makes it easy to puff a light, even layer into crevices. Silica gel-based dusts and those containing cyfluthrin or deltamethrin all work for spiders.
When applying any insecticide indoors, try to contact as many existing webs and spiders as possible. Treat along joists and rafters in basements and crawl spaces where funnel webs tend to appear.
What Hobo Spider Bites Look Like
Part of the urgency people feel about hobo spiders comes from their reputation as dangerous. Hobo spider bites rarely cause pain at the moment they happen. Symptoms that may develop afterward include a severe headache (sometimes within minutes, potentially lasting a week), hardened or reddened skin at the bite site, swelling, blisters, fatigue, and nausea. Some people report memory problems or difficulty concentrating.
If you suspect a hobo spider bite, clean the area thoroughly and seek medical attention. Most people recover fully with proper care. The bite area should be kept clean and watched for signs of infection.
When to Call a Professional
If you’ve decluttered, sealed entry points, set traps, and applied insecticides but keep finding hobo spiders regularly, a professional pest control service can assess the situation more thoroughly. Professionals have access to stronger products and can identify harborage sites you might have missed, particularly in crawl spaces, wall voids, and other hard-to-reach areas. A persistent infestation that doesn’t respond to DIY methods over a few weeks usually signals that there’s either a large outdoor population very close to the home or an unsealed entry point you haven’t found yet.