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Scoliidae, or the scoliid wasps, is a family of around 300 described species of wasps found worldwide. They are solitary parasitoids whose larvae develop on the larvae of other insects, most commonly the scarab beetle. Females search for hosts in soil or rotting wood, sometimes following tunnels created by the beetle larvae. After locating a host, the female stings and paralyses it and may move it into a chamber before laying a single egg on the immobilised grub. Because many scarab beetles are agricultural pests, scoliid wasps can act as important biological control agents. Adult wasps often visit flowers and may function as minor pollinators. In some species, orchid flowers mimic female wasps and attract males, which attempt to mate with the flowers and thereby pollinate them. This male scoliid wasp of the species Megascolia bidens was photographed near Soliman on Cape Bon, a peninsula in northeastern Tunisia.Photograph credit: Charles J. Sharp