Ichneumon is a genus of parasitoid wasps in the family Ichneumonidae.

This genus includes about 270 species: In the eighteenth century Ichneumon was regarded as an instance of the God-given balance in nature; in the nineteenth the possibility of using it as a form of biocontrol was briefly entertained.

It was used as the symbol of the reformed Entomological Society of London in 1833.

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