Wasps are a diverse group of insects with different forms of life. Some are eusocial and live in colonies, but most are solitary species. There are many families and subgroups of wasps in the world. In the Mediterranean region, the most important are the cuckoo wasps (Chrysididae), the spider wasps (Pompilidae), Scoliidae, Sphecidae, and the vespids (Vespidae).