Ocyptamus fascipennis is a species of predatory insect belonging to the family Asilidae, commonly known as robber flies. It is characterized by its medium-sized body, reaching about 1.5 centimeters in length, and its distinct black and yellow striped abdomen. This species is known for its strong flying ability and aggressive hunting behavior, preying on a variety of other insects in flight. Ocyptamus fascipennis is found in various habitats, including forests, grasslands, and gardens, across its range in North America.