Ratarda excellens (Strand, 1917)

缺韁蠹蛾(Ratarda excellens)是木蠹蛾科(Cossidae)缺韁蠹蛾亞科(Ratardinae)，本種雄蟲的前翅為褐色底，有六條中間深灰色外有兩條黑線的寬帶，後緣有三至四枚黃斑；後翅為黑褐色底，無其他翅紋。缺韁蠹蛾亞科是一類白天出沒，分類上十分原始的蛾種。

A Brief Introduction:
As an endemic and rare species, Ratarda excellens represents the only member of Ratardinae in Taiwan and could be easily identified by its wing pattern. Although the unique wing pattern, sexual dimorphism had caused a chaotic taxonomic history until Owada's excellent study.