Clanis bilineata formosana Gehlen, 1941, Ent. Z., Frankf. a.M. 55: 178. Type locality: Formosa [Taiwan].
Note. As this is quite a variable species with regard to wing patterning and DNA barcodes, with these having no apparent habitus or geographical correlation, Eitschberger, 2004, Neue ent. Nachr. 58: 79-80 synonymized all subspecies with the nominotypical subspecies. However, reinstated as a subspecies of Clanis bilineata by Heppner, 2012, Lepid. Novae 5: 32, who asserted that 'The subspecies concept is that they are merely geographic labels for disjunct populations of a single species and need no specific morphological differences to be established as such. Each population surely has some differences, but geographic isolation should be the only criterion in using subspecies names'. There is no scientific justification for such a subspecies definition and it is therefore rejected. Resynonymized with the nominotypical subspecies by Kitching and Rougerie et al., 2018, Biodivers. Data J. 6: e22236.
Taiwan: iii-iv (Hualien Hsien); iii-v (Kaohsiung Hsien); v (Pingtung Hsien); vi (Kaohsiung Hsien); vii (Pingtung Hsien); ix (Pingtung Hsien).
Larval hostplants. On Pueraria montana var. lobata in Taiwan (ShiPher Wu, pers. comm. 2012). Also Callerya nitida, Callerya reticulata, Pongamia pinnata [syn. Millettia pinnata], Mucuna macrocarpa and Ormosia formosana.
Taiwan: Nantou Hsien (Puli); Pingtung Hsien (Kenting); Kaohsiung Hsien (Shanping, 640m; Liukuei); Taipei (Shikanshuei; Jingmei); Taipei Hsien (Hsintien); Hualien Hsien (Taroko National Park).
Endemic to Taiwan.