Hobo spiders are large (up to 1/2 inch long), brown, and have a chevron-shaped pattern on their abdomen. They are most easily identified by their large size and their chevron-shaped pattern.
The best way to get rid of hobo spiders is to eliminate their food sources by thoroughly cleaning your kitchen and bathroom. You can also use commercial fly traps or bait. If you have a severe infestation, you may need to call a professional exterminator.