Annotated catalog of the northwest Caucasian Nepomorpha and Gerromorpha (Heteroptera).

A catalog of aquatic and semiaquatic Heteroptera of the northwest Caucasus is provided based on literature reports and field collections. Representatives of 50 species of the infraorders Nepomorpha and Gerromorpha are listed and are distributed in 11 families, including Aphelocheiridae (1 genus, 1 species), Corixidae (6 genera, 23 species), Gerridae (3 genera, 9 species), Hebridae (1 genus, 2 species), Hydrometridae (1 genus, 2 species), Mesoveliidae (1 genus, 1 species), Naucoridae (1 genus, 1 species), Nepidae (2 genera, 3 species), Notonectidae (2 genera, 4 species), Pleidae (1 genus, 1 species) and Veliidae (2 genera, 3 species). Five species listed for the fauna of the northwest Caucasus are doubtful. Types of ranges of all species are given. Zoogeography of the regional fauna is discussed.

Notes on the distribution and ecology of the genus Stenelmis Dufour, 1835 (Coleoptera: Elmidae) in the Caucasus.

The distribution of the genus Stenelmis (Elmidae) of the Caucasus is reviewed based on materials collected by the authors and examined specimens stored in accessible collections. One of the two species present in this region, represented by the subspecies Stenelmis consobrina consobrina Dufour, 1835, is recorded for the first time in Krasnodar Krai and possibly in Armenia; Stenelmis puberula Reitter, 1887 is recorded for the first time in Russia (Krasnodar Krai and the Republic of Adygea) and Abkhazia.