Figures 31-42 from: Han H, Jiang N, Xue D (2011) A review of Biston Leach, 1815 (Lepidoptera, Geometridae, Ennominae) from China, with description of one new species. ZooKeys 139: 45-96. https://doi.org/10.3897/zookeys.139.1308

Figures 31-42 - Adults of Biston. 31–32 Biston pustulata. 31 male 32 ditto, underside. 33–40 Biston suppressaria. 33 male (holotype of Biston suppressaria benesparsa) 34 ditto, underside 35 male (Cili, Hunan) 36 ditto, underside 37 male (Diaoluoshan, Hainan) 38 male (Bawangling, Hainan) 39 female 40 ditto, underside; 41–42 Biston regalis. 41 male 42 female. Scale bar = 1 cm.