Rare insect fossils, this insect has basically disappeared from the market [Era]: Jurassic - about 164 million years [Level]: Jiulong Mountain Group [Origin]: Daohugou, Ningcheng, Inner Mongolia - Asia Insect size: 20mm Stone slab size: 90mm Characteristics: The size of wasp flies varies greatly from small to large, with body length ranging from 2 to 20 mm. They come in a variety of colors and are often covered in various colors of hair and scales. Some species are naked and hairless, often with long beaks, and often have variously shaped spots on their wings. Adult wasp flies look like Hymenoptera insects, hence their name. It is a famous mimic insect. Bee fossils are of great significance for studying the origin, evolution, and classification of bees.