Data were recorded in 1995-1997, An annotated list of species contains a full reference to the specimens collected, notes on biotope preferences, and relative abundance of spp. For some spp., taxonomic notes and data on variation are given. Among the 31 spp., there are the Manchurian Cercion v-nigrum Needh. and Anisogomphus maacki (Sel.), previously thought to range westwards up to Blagoveshchensk only. Anax parthenope Sel. and Pantala flavescens Fabr. proved to occur in Transbaikalia. The Chinese/Mongolian Ophiogomphus spinicornis Sel. enters the Russian territory in southern Transbaikalia, Baikal region and southern Tuva.