Hypoderma lineatum is a species of fly belonging to the family Oestridae, commonly known as the cattle grub or ox warble fly. This insect is primarily found in North America and Europe, where it lays its eggs on the skin of cattle. The larvae develop under the skin, causing irritation and potential health issues for the host animal. The life cycle of Hypoderma lineatum includes several stages: egg, larva, pupa, and adult fly. After hatching, the larvae burrow into the host's skin, where they can remain for several months before emerging as adult flies. Control measures often involve insecticides and management practices to reduce infestations in livestock.