Polydrusus formosus is a species of broad-nosed weevil belonging to the family Curculionidae, subfamily Entiminae.

The colour of this insect is brilliant metallic green, as the black body is coated in emerald round scales.

The soil-inhabiting larvae grow up to 7 millimetres (0.28 in) long feeding on juicy plant roots.

The adults are eaters of young leaves and open blossoms of a wide variety of woodland trees and shrubs (Corylus avellana, Quercus species, etc.

They are considered a pest of fruit trees, causing extensive damages to their buds, blossoms and shoots.