Hemiptarsenus ornatus (Nees 1834)

are parasitoids of

• Global Biotic Interactions: Cameraria ohridella Deschka & Dimic 1986 (horse-chestnut leaf miner)

have host

• Global Biotic Interactions: Chromatomyia horticola Goureau 1851
• Global Biotic Interactions: Stigmella betulicola (Stainton 1856) Beirne 1945
• Global Biotic Interactions: Phyllonorycter anderidae (W. Fletcher 1885)
• Global Biotic Interactions: Phytomyza melana Hendel 1920
• Global Biotic Interactions: Phyllonorycter nigrescentella (Logan 1851)

visit flowers of

• Global Biotic Interactions: Sonchus asper (L.) Hill (spiny sowthistle)
• Global Biotic Interactions: Ranunculus repens L. (creeping buttercup)
• Global Biotic Interactions: Cirsium arvense (L.) Scop. (Creeping Thistle)