Cerceris fumipennis, commonly known as the smoke-colored bee hunter, is a species of solitary wasp belonging to the family Crabronidae. These insects are found in North America and are known for their unique hunting behavior. The females of C. fumipennis capture and paralyze bees, which they then use as food for their developing larvae. They are important pollinators and play a crucial role in maintaining the balance of insect populations.