Megamerinidae Fly - Insect - Animals Mating

The Megamerinidae is a family of small flies (Diptera), including approximately 11 species across three genera. These flies are characterized by their elongated, basally constricted abdomens. This family has been categorized into various superfamilies, including Diopsoidea, Nerioidea, and more recently, Opomyzoidea. However, the evolutionary relationships among these families are still not well understood. These are slender, medium-sized flies characterized by their long abdomens. The hind femora are thickened and feature two rows of spinules on the underside. Notably, they do not possess ocelli. The biology of immature Megamerinidae is not well understood, but larvae have been observed as predators living under bark or in decaying vegetation. Two Megamerinidae flies mating on the leaf, sometimes flying around in a mating state on Tehatta, West Bengal, India on 22/12/2024.