Rhagastis aurifera formosana Clark, 1925, Proc. New Engl. zool. Club 9: 37. Type locality: Central Formosa [Taiwan, Nantou Hsien], Horisha [Puli].
Synonym. Rhagastis aurifera formosana Clark, 1925.
Wingspan: 53--68mm. Identical to Rhagastis castor castor, but smaller.
Taiwan: iii-xi (Hualien Hsien); iii-v (Kaohsiung Hsien); viii (Yilan Hsien).
OVUM:
LARVA:
PUPA:
Larval hostplants. Saurauia tristyla, Hydrangea chinensis and Tetrastigma formosanum.
Unknown.
Taiwan: Hualien Hsien (Taroko National Park); Nantou Hsien (Puli); Yilan Hsien (Taipingshan); Kaohsiung Hsien (Shanping, 640m; nr. Tuona, 12km SE of Shanping, 750m); Taipei Hsien (Fushan); Chiayi Hsien (Shanmei, 800m).
Endemic to Taiwan.