Tribe Campsomerini

Campsomerini is a tribe within the family Scoliidae (Superfamily Scolioidea, Order Hymenoptera), comprising a group of large, robust parasitoid wasps commonly found in warm regions of the world. Members of this tribe are especially abundant in tropical and subtropical habitats, including grasslands, forest edges, agricultural fields, and sandy or open soils where their hosts occur.

Wasps of the tribe Campsomerini are typically medium to large in size and have a robust, often hairy body. Many species display striking coloration, commonly black with yellow or orange bands or markings, and may have iridescent wings with blue or violet reflections. The body is adapted for digging, with strong legs that enable females to burrow into soil in search of hosts.

The head is well developed with strong mandibles and large compound eyes. Females possess a functional stinger, which is primarily used to paralyze prey rather than for defense. Despite their formidable appearance, these wasps are generally non-aggressive and rarely sting unless handled.

The life cycle involves complete metamorphosis. Females search for larvae of soil-dwelling beetles, particularly scarab beetles. Once a host is located, it is stung and paralyzed, and an egg is laid on or near it. The developing larva feeds externally on the immobilized host, eventually consuming it before pupating in the soil.

Adults feed primarily on nectar and are frequently observed visiting flowers, where they may contribute to pollination. They are typically active during warm daylight hours and are often seen flying close to the ground while searching for hosts.

The tribe includes genera such as Campsomeris and related forms, which vary in size, coloration, and distribution.

Ecologically, Campsomerini plays an important role in controlling populations of beetle larvae, many of which are agricultural pests. Their parasitoid behavior helps regulate these populations naturally, while their nectar-feeding habits support pollination. As a result, they are beneficial insects in both natural ecosystems and agricultural landscapes.