The brown marmorated stink bug Halyomorpha halys (Stål, 1855) (Heteroptera: Pentatomidae): expansion of its range in the European part of Russia, description of the imago and larvae, and the diagnostics of the species.
A new regional record of Halyomorpha halys (Stål, 1855) from the territory of the European part of Russia is given; this find indicates the further spread to the north of this invasive species, first recorded in Russia on the Black Sea coast of the Caucasus three years ago. Until now, the northernmost place of finding of H. halys in Russia was Staromyshastovskaya Village of the Dinsky District in the Krasnodar Region. In 2019, stable populations of the species were found in Rostov-on-Don (Rostov Region). The article also provides an illustrated complete morphological description of the imago and all larval instars, as well as data for identification of the species, including characters that distinguish H. halys from all the more or less similar species of the shield bugs in the fauna of European Russia.