Zeller-1876
Guides
Adela trigrapha
Three-striped Longhorn
Adela trigrapha is a fairy longhorn moth in the family Adelidae, described by Zeller in 1876. It occurs in western North America from Vancouver Island to California. Adult males display striking sexual dimorphism with extremely long antennae and black forewings marked by three white lines, while females have shorter antennae, orange heads, and metallic blue-purple wings. The species belongs to a family characterized by elongated antennae, particularly in males.