SymmorphusSymmorphus is a primarily holarctic genus of potter wasps. It is within the family Vespidae.SpeciesSymmorphus albomarginatusSymmorphus alkimusSymmorphus allobrogusSymmorphus ambotretusSymmorphus angustatusSymmorphus apiciornatusSymmorphus aurantiopictusSymmorphus bifasciatusSymmorphus canadensisSymmorphus canlaonicusSymmorphus captivusSymmorphus carinatusSymmorphus cliensSymmorphus connexusSymmorphus crassicornisSymmorphus cristatusSymmorphus debilitatusSymmorphus decensSymmorphus declivisSymmorphus foveolatusSymmorphus fuscipesSymmorphus glasunowiSymmorphus gracilisSymmorphus hoozanensisSymmorphus incisusSymmorphus iwataiSymmorphus jucundusSymmorphus lucensSymmorphus mizuhonisSymmorphus momunganensisSymmorphus murariusSymmorphus negrosensisSymmorphus nipteroidesSymmorphus ornatusSymmorphus palawanensisSymmorphus paralleliventrisSymmorphus parvilineatusSymmorphus projectusSymmorphus sichuanensisSymmorphus sublaevisSymmorphus tsushimanusSymmorphus tukvarensisSymmorphus violaceipennisSymmorphus yananensis ''Symmorphus yunnanensis''DistributionMany species within this genus are present in most of Europe, in East Palearctic realm, in the Near East and in the Oriental realm. Three species are found in North America.DescriptionThese small solitary wasp can reach a length of about. They nest in pre-existing cavities. Partitions between cells are made of mud. Adult females prey on caterpillars and larvae of beetles to lay eggs in them.