(adults Fig. 21D; male gen. Figs. 41H, 41I; female gen. Fig. 50G)
Acidalia bisetata (Rottemburg, 1777): Erschov & Field, 1870: 163; Staudinger & Wocke, 1871: 149; Staudinger & Rebel, 1901: 271.
Sterrha biselata: Viidalepp, 1976: 847; Belova, 2000a: 106; 2000b: 25; 2003: 88; 2008: 45.
Idaea biselata biselata: Viidalepp, 1996: 50.
Idaea biselata: Gordeeva & Gordeev, 2007: 122; Mironov et al., 2008: 206; Berlov & Berlov, 2008: 50; Belova, 2010: 21; Makhov & Shilenkov, 2012: 21; Mironov & Belova, 2015: 61; Beljaev & Mironov, 2019: 276.
Material examined. Irkutskaya Oblast : Lavrentyevo, 10.VIII.2011, 2 ♁; same loc., 30.VII.2011, 1 ♁; same loc., 31.VII.2011, 2 ♁; same loc., 1.VIII.2011, 1 ♁; same loc., 3.VIII.2011, 2 ♁; same loc., 6.VIII.2016, 1 spm.; same loc., 23.VII.2017, 1 ♁ (GenBank ID: MZ148338); D. Lebedinoye, 2.VIII.2012, 1 spm.; Galaktika, 6.VIII.2013, 2 spms.; B. Koty, 31.VII.2016, 1 ♀, 14 spms.; same loc., 1–3.VIII.2016, 3 spms.; Tazheranskaya steppe, 23.VII.2019, 1 ♁; same loc., 28.VII.2020, 1 ♁, I. Makhov; Khara-Murin, 30.VII.1984, 1 ♁, S. Sinev [ZIN]; Irkutsk, 3.VIII.2011, 1 spm.; same loc., 25.VII.2009, 2 spms.; Fakel, 10.VIII.2009, 1 spm.; same loc., 21.VII.2009, 1 spm.; same loc., 31.VII.2009, 1 spm.; same loc., 14.VII.2004, 1 spm., E. Berlov [EB]; Podkamennaya, 13.VII.2020, 1 ♁, V. Shilenkov [BF]. Buryatia: M. Tasarkhay, 9.VII.2016, 1 ♀; Rechka Vydrinaya, 24.VII.2014, 1 ♁; same loc., 27.VII.2014, 1 ♀; Selenginsk, 5–6.VIII.2019, 1 ♁; Bayan, 9.VIII.2020, 1 ♀, I. Makhov [ZIN].
Distribution. Transeurasiatic, temperate. Throughout the Russian territory from Kaliningradskaya Oblast to Primorye, Sakhalin Isl. and Kuriles, Kamchatka, Magadanskaya Oblast and northern part of Khabarovsky Kray. Outside Russia: Europe, Transcaucasia, Turkey, Kazakhstan, Mongolia, NE China, Korea, Japan (Hokkaido, Honshu, Shikoku, Kyushu Isl.).
Hostplants: flaccid leaves of trees and shrubs (Alnus, Lonicera), and also different herbs (Trifolium, Taraxacum, Antirrhinum, Leontodon, Polygonum, Rubus, Plantago, Rumex, Campanula and Poaceae) (Burnasheva & Beljaev 2011; Beljaev 2016).