Hymenoptera (Butterfly or Butterfly) is a large family and widely distributed. Only 1 0,000 species of broom have been described. Most of them are relatively small, rarely larger than 1.2 cm (0.5 inch). Usually green or blue with metallic luster. The abdomen can bend and bend into a ball when frightened. Everything is lonely and parasitic. Most of them are parasitic on adult bees or wasp larvae, Cleptes are parasitic on sawfly larvae, and Mesitiopterus is parasitic on the eggs of stick insects. Some species lay eggs in the nests of other solitary wasps or bees, just as cuckoos lay eggs in other nests, hence the name. Its eggs are laid in unfinished nests of other wasps or bees. Later, the nest owner laid eggs himself, prepared food for the larvae and sealed the nest. The larvae of wasps eat the larvae of the host or eat the food of the host and starve it to death.