Breadform is a completely deformed insect, that is, adult, egg, larva and pupa. The newly emerged adult 1 wings are soft and white, then yellow and brown, and gradually turn black with metallic luster. The head protrudes forward, and both sides of the base of the lip do not exceed the tactile base. In the process of emergence, the adult's head, chest and feet are light brown, while the abdomen and COLEOPTERA are milky white, and the insect body begins to be immature and unwilling to move. COLEOPTERA is black, hard and elastic, and the second pair of wings are membranous wings.