Membracis is a genus of insects belonging to the family Membracidae, commonly known as treehoppers. These insects are characterized by their unique and elaborate pronotum, which resembles a thorn or horn-like structure. They are found in various habitats, including forests and grasslands, and are known for their ability to jump and fly. Membracis species feed on plant sap and play a role in pollination and nutrient cycling in ecosystems.