The types and undescribed material of the hymenopteran fossils of the Insect Bed of the Bembridge Marls from the Isle of Wight (UK) are critically revised and studied. A total of 1460 fossils are recorded and attributed to 20 families: Gasteruptiidae s.l. (1); Proctotrupidae (3); Diapriidae (24); Cynipidae (7); Figitidae (6); Pteromalidae (1); Agaonidae (3); Scelionidae (12); Platygastridae (2); Ichneumonidae (32); Braconidae (75); Bethylidae (3); Crabronidae (2); Sphecidae (1); Apidae (2); Scoliidae (1); Tiphiidae (2); Vespidae (4); and Formicidae (1220). Described as new are 51 species, 13 genera, two tribes and two subfamilies. Minimum number of species recorded (either as described species or representing higher taxa with no described species in the assemblage) is 118. The composition of the hymenopteran assemblage is most similar to that of Baltic amber and indicative of a well forested territory, as well as of a humid, equable (aseasonal but not very hot) climate, more typically equable than in the Baltic amber source area, judging from the absence of Aphidiinae and scarcity of aphids.

The ant fossils of the Bol'shaya Svetlovodnaya (Late Eocene of Sikhote-Alin, Russian Far East) are studied. A total of 80 specimens are identified as Formicidae. The location is quite diverse in composition of ant: described 15 genera and 9 subfamilies. A generic level comparison reveals Svetlovodnaya ants as more similar to European rather than North American ant fauna. Unusually high proportion Myrmicinae (21.4%) for the known deposits of Europe, where these ants become abundant only in the Miocene. A distinctive feature of the Svetlovodnaya ant assemblage under comparison with the European and North American ones is the lack of highly dominanting species. Presences of strictly tropical and temperate taxa support the equable climate concept as applicable to the Late Eocene climate of the Sikhote-Alin area. New genera and species are described from the Bol'shaya Svetlovodnaya: Aneuretinae-Paraneuretus dubovikoffi sp. n., Dolichoderinae-Dolichoderus pinguis sp. n., Emplastus macrops sp. n., Emplastus elongates sp. n., Emplastus dubius sp. n., Liometopum incognitum sp. n., Formicinae-Formica biamoensis sp. n., Formica paleosibirica sp. n. Gesomyrmex magnus sp. n., Gesomyrmex macrops sp. n., Gesomyrmex incertus sp. n., Myrmeciinae-Ypresiomyrma orientalis sp. n., Amblyoponinae-Casaleia orientalis sp. n., Ponerinae-Pachycondyla oligocenica sp. n., Pachycondyla aberrans sp. n., Proceratiinae-Proceratium petrosum sp. n., Myrmicinae-Agastomyrma laticeps sp. n., Biamomyrma zherikhini sp. n., Biamomyrma lata sp. n., Biamomyrma rugosa sp. n., Myrmecites sibiricus sp. n., Myrmecites dubius sp. n., Myrmecites major sp. n. , also at least two species of Lasius and one species of Cerapachyinae. Резюме. В статье приведены результаты исследования позденэоценового местонахождения схожесть мирмекофауны Большой Светловодной и китайских местонахождений по характерному отсутствию явных доминирующих групп как по числу экземпляров, так и видов. Наличие наравне с обычными обитателями умеренного климата (Lasius и Formica) муравьев теплых тропиков Aneuretinae, Gesomyrmex и Myrmeciinae свидетельствует в пользу того, что во времена захоронения климат этой местности был значительно более ровный и мягкий.

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