Bald-faced hornets are small (up to 1/2 inch long), brown, and have a black band on their abdomen. They are most easily identified by their small size and their black band.
The best way to get rid of bald-faced hornets 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 contact a professional exterminator.