What is the largest insect?

Well, among the longest insects are the South American long-horned beetle (Tytanus giganteus), which measures almost 10 inches long, and a stick insect — Pharnacia serritypes, a group where the females can measure more than 14 inches long. The heaviest insect is the African Goliath beetle (Megasoma elephas), which can weigh up to about 3-1/2 ounces.