Cusparis

Cusparis is a genus of flies in the family Tachinidae. The name Cusparis is derived from the Latin words "cusparis," meaning "divided," and "femur," referring to the distinctive division of the femur, the long bone of the leg in insects. Adult flies of the genus Cusparis have elypepod sloping downwards at the tip.

Cusparis is found in the entomological collections of Great Britain, Europe, and Asia. The species within the genus are relatively rare and have not been extensively studied. There are currently only a few reported species within the genus.

The hosts of Cusparis flies are primarily found in the stalks of wild plants, mostly in damp, shaded areas. The larvae of Cusparis feed on the internal organs of these plants.

Adult flies exhibit slow, floating flight movements around plants before landing on them, after which they insert their eggs within the host plant's stems. Female flies typically target stems with thickest cuticle growth because such stems provide better insulation and quicker larval growth.