''Ratarda excellens'' is a

moth Moths are a group of insects that includes all members of the order Lepidoptera that are not Butterfly, butterflies. They were previously classified as suborder Heterocera, but the group is Paraphyly, paraphyletic with respect to butterflies (s ...

in the family

Cossidae The Cossidae, the cossid millers or carpenter millers, make up a family of mostly large miller moths. This family contains over 110 genera with almost 700 known species, and many more species await description. Carpenter millers are Lepidopter ...

. It is found in

Taiwan Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main geography of Taiwan, island of Taiwan, also known as ''Formosa'', lies between the East China Sea, East and South China Seas in the northwestern Pacific Ocea ...

. The length of the forewings is about 16 mm for males and 22 mm for females.The Systematic Position of Shisa excellens (Lepidoptera, Ratardidae)
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References

Natural History Museum Lepidoptera generic names catalog
Ratardinae Moths described in 1917 {{Cossoidea-stub