Agrypon flaveolatum is a species of parasitoid wasp belonging to the family Ichneumonidae described by Johann Ludwig Christian Gravenhorst in 1807.

Agrypon flaveolatum is native to Europe and Asia where it is a parasitoid of geometrid moths.

When the winter moth (Operophtera brumata) was accidentally introduced into Nova Scotia, Canada, in the 1920s, it caused the damage and death of many native trees by defoliation.

[2] Another outbreak of winter moths occurred on Vancouver Island in British Columbia, Canada, where it was accompanied by the bruce spanworm (Operophtera bruceata).

[2] When an outbreak of winter moths occurred in the US state of Massachusetts in the first decade of the 21st century, the fly was the biological control of choice because it was feared that the wasp might parasitize other geometrid moths, of which there were about a dozen rare species in the state.