New data on spider wasps of the subgenus Ammosphex Wilcke, 1942 (Hymenoptera, Pompilidae, Arachnospila Kincaid, 1900) from Western Siberia, Russia.

The new species, Arachnospila (Ammosphex) altaica Loktionov, sp. nov., is described and illustrated from the Altai Republic, Western Siberia, Russia based on male specimens.

Review of the genus Pamirospila Wolf, 1970 (Hymenoptera, Pompilidae), with description of a new species.

Seven species of the genus Pamirospila Wolf, 1970 are reviewed, of them, P. montana Loktionov, sp. nov.

Discovery of a new extinct spider wasp (Hymenoptera, Pompilidae) from Eocene Rovno amber.

Paleogenia waichertae Loktionov, Lelej et Perkovsky, sp. nov. is a new species of extinct spider wasps.

Spider wasps (Hymenoptera, Pompilidae) of the Republic of Khakassia, Eastern Siberia, Russia.

The spider wasp fauna of the Republic of Khakassia (Eastern Siberia, Russia) is revised. The number of species recorded from Khakassia has increased from 15 to 60, genera-from 4 to 17, subfamilies-from 2 to 3. An annotated list of the species with citation, examined material, and general distribution is given.

The type material of spider wasps (Hymenoptera, Pompilidae) deposited in the Federal Scientific Center of the East Asia Terrestrial Biodiversity, Russian Academy of Sciences, Vladivostok, Russia.

The type material of spider wasps deposited in the Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia is catalogued. In total, this includes 305 primary type specimens (31 holotypes and 274 paratypes) belonging to 62 species and 1 subspecies, described between 1962 and 2019 from Russia, Tajikistan, China, South Korea, Japan, Laos, Indonesia, and Sri Lanka. All 31 holotypes are illustrated with color photographs and black-and-white drawings.