Idaea muricata (Hufnagel, 1767):

E.Siberia, 10 km E Irkutsk, 15-VII-2003, leg. E.Berlov The forewing length is 9 mm. det. E.Berlov

This specimen from S.Russia is given for comparison: W.Caucasus, Krasnodarsky Krai, Sochi envir., Loo, at light, 9-VIII-1975, leg. A.Pleshanov (coll. SIFIBR) The forewing length is 8 mm. det. E.Berlov