If possible ignore them as they provide a valuable service in the environment and crop production. To control them first locate the holes leading to the nests. After dusk, treat the tunnels and the surrounding area with an appropriately labeled insecticide. If the nest is on a building an aerosol spray for wasps and bees may be directed at the nest for control. Inside the house use a flyswatter or an aerosol labeled for indoor flying insect control.
Carpenter bees are large bees that closely resemble bumble bees.
The top of the bee's hairless abdomen is metallic and iridescent, reflecting blue, blue-black, purple, green, bronze or buff colors. The thorax and legs are noticeably hairy. They fly about and hover almost without regard for human activity. Luckily they are generally docile and not easy to incite to sting. Males zoom swiftly between buildings, sometimes rising to 60 feet or more in the air.