Diplazon laetatorius

Diplazon laetatorius

Length 10 mm. This wasp is identified by the white, black and orange banded hind tibia. The overall ground colour is black and reddish, with a distinctive white spot at the rear of the thorax.

This is a parasitic wasp mainly of hoverfly larvae, pupae and eggs, but also other diptera species. The females use their long ovipositors to inject the host and lay eggs inside it, and when the resulting larvae hatch they feed internally and eventaully kill the host organism.

It is seen June to September, and found in meadows and hedgerows. It appears to be fairly common.

Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps & Sawflies)
Family Ichneumonidae (Ichneumon Wasps)
Species Diplazon laetatorius (Fabricius, 1781)

Photos: Back garden, South Stafforshire August 2016. © Peter Hillman