''Horismenus'' is a genus of

hymenoptera Hymenoptera is a large order (biology), order of insects, comprising the sawfly, sawflies, wasps, bees, and ants. Over 150,000 living species of Hymenoptera have been described, in addition to over 2,000 extinct ones. Many of the species are Par ...

n insects of the family Eulophidae occurring primarily in the

Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...

. over 400 species in the genus have been described. ''Horismenus'' species are often described as parasitizing other insects.

References

Key to Nearctic eulophid generaUniversal Chalcidoidea Database
Eulophidae Taxa named by Francis Walker (entomologist) Hymenoptera genera {{Eulophidae-stub