Larvae of 9 species of Odonata from 12 water bodies of Buryatia are observed: Enallagma cyathigerum, Coenagrion lunulatum, Erythromma najas, Aeshna crenata, Somatochlora exuberata, S. graeseri, S. sahlbergi, Epitheca bimaculata и Leucorrhinia orientalis. All of founded species are not new to fauna of Buryatia, but the geography of their findings has significantly extended. The analysis of literary and our data has allowed to reveal the terms of flying of the studied species which are in general in range from the beginning of June to the end of August. It is established that the egg phase of C. lunulatum, E. cyathigerum, E. najas and E. bimaculata can have two parallel ways of development – with winter diapause and without it that, perhaps, is important adaptation to winter frost penetration in reservoirs. The analysis of seasonal age dynamics of larvae of E. cyathigerum has shown that the cycle of development of species in the Chivyrkuysky Bay of Baikal is one-year and implement in two independent generations – spring and summer. On the basis of the elicited new facts was confirmed that populations of Erythromma najas in Baikalian region belong to subspecies of E. n. baicalensis (Belyshev, 1964), but not to Far East one E. n. humerale (to Selys, 1887). The literary and original data, and also collection materials are allowed to form the list of 37 species of Odonata known so far for the territory of Buryatia.