Hymenoptera is the general name of Lepidoptera Hymenoptera, with about 500 species. Distributed all over the world, mostly in the tropics. The larvae are short and fat, like slugs. No abdominal feet, replace them with suction cups. When you move, you don't crawl but slide. Some larvae are brightly colored, and the appendages are densely covered with brown bristles, like unkempt hair. When cocooning, appendages extend out of the cocoon for protection and camouflage. When disturbed, it will sting people with stinging hair, causing a rash. Feed on plants. The pupa turns into an oval cocoon, which is attached to the leaves. The larva of the thorn moth is often called Vitex negundo, which is called pepper (dialect) in the northeast, and the cocoon is called spicy jar (dialect). Lu Dongfang called furuncle hair, pig hair and touching hair.