Parasitoid wasps on a female bush cricket

Photograph of 4 adult female parasitoid wasps on the base of the egg-laying organ (ovipositor) of a large bush cricket female. When the cricket lays her eggs the wasps will descend the ovipositor, quickly laying their own eggs inside those of the cricket. This 'riding' behaviour is called 'phoresy' and is probably far more widespread in parasitoids than presently known. This parasitoid is a new species, each approximately 1 mm in length.