Hymenoptera is one of the largest insect orders, with a world fauna approximately of 160 thousand species in more than 8420 genera from 94 extant families, a Palaearctic fauna of 50–60 thousand estimated species, and a Russian fauna of 15.3 thousand species in 1999 genera from 78 families. The modern classification of Hymenoptera is given. The second volume treats the all recent groups of parasitoids (11 superfamilies, 43 families, 1466 genera, about 10.6 thousand species) recorded in the fauna of Russia. The sections for each of the 43 families include characteristics, number of taxa, references, and an annotated catalogue of the genera and species (subspecies) recorded from the fauna of Russia. For each valid genus, the type species, synonymy, short characterization, and number of species are given. For each valid species the synonymy, known host (often to genus or family level only) or sometimes host plants and distribution (in Russia and in general) are provided. The book is illustrated using geoschemes for Russia, Europe, and China. The large bibliography helps to assess the level of study of each family. The index of scientific names of Hymenoptera (more than 21 thousand names) will be useful for parasitoid taxa searching.