Phigalus

Phigalus is a genus of parasitic flies belonging to the family Tachinidae. These flies are known to parasitize various beetle larvae, primarily those within the families Scarabaeidae and Elateridae. The adult flies deposit their eggs or larvae near or on the host beetle larva. Once hatched, the parasitic larvae burrow into the host and feed internally, eventually leading to the host's death.

Phigalus flies are characterized by their robust build and often have a metallic sheen to their bodies. Diagnostic features often include specific chaetotaxy (arrangement of bristles) on the head and thorax, as well as details of the wing venation and the structure of the male and female genitalia.

Species within the Phigalus genus are geographically distributed across various regions of the world, with some species having a relatively broad distribution, while others are more localized. The specific identification of Phigalus species requires careful examination by a trained entomologist. The ecological role of Phigalus as a parasitoid contributes to the natural regulation of beetle populations in various ecosystems.