New data on geometroid moths (Lepidoptera: Geometroidea: Uraniidae and Geometridae) from Sakhalin and Moneron islands with notes on their taxonomy, distribution and ecology.

The paper treats 51 species of geometroid moths (Lepidoptera: Uraniidae and Geometridae) from Sakhalin and Moneron islands, Russian Far East. Among them, one species (Trichopteryx fastuosa Inoue) is first reported from Russia; ten speciesfirst recorded for Sakhalin (Uranidae Epipleminae: Eversmannia exornata (Eversmann), Dysaethria illotata (Christoph), and D. moza (Butler); Geometridae: Idiotephria evanescens (Staudinger), Lampropteryx minna (Butler), Lomographa simplicior (Butler), Pachyerannis obliquaria (Motschulsky), Venusia phasma (Butler), V.