Microdon_mutabilis
Microdon mutabilis
Species of fly
Microdon mutabilis, is a species of hoverfly. It is found in many parts of Britain and Europe. The distinctive almost slug-like larvae live in ants' nests.[1] They are hemispherical in shape, heavily armoured and believed to prey on the eggs and larvae of a number of ant species, including Formica lemani, Formica fusca, Lasius niger and Myrmica ruginodis.[2] It was described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae.[3]