A second addition to the Odonata fauna of Azerbaijan

The article contains new faunistic data on 53 Odonata species based on material collected by the authors in Azerbaijan between 2013-2014 and added by revising an old collection made by A.V. Bogachev in the 1930-1940s. Of these, 13 species are new for the country: Lestes dryas, L. sponsa, L. virens, Coenagrion hastulatum, C. lunulatum, C. ornatum, C. pulchellum, Aeshna affinis, Brachytron pratense, Cordulegaster picta, Somatochlora flavomaculata, Sympetrum flaveolum, S. vulgatum. The new locality of Cordulegaster picta is the easternmost for the species. Two new populations of a very rare species Cordulegaster vanbrinkae (discovered in the country in 2011) are found. Somatochlora flavomaculata and Brachytron pratense are generally very rare in the entire Caucasus. Pantala flavescens has been rediscovered in the country 100 years after the first record. A large population of Caliaeschna microstigma, a species very rare in Azerbaijan, has been found in the northern part of the country; it represents a peculiar dark morph whose features are described in detail. Particularly discussed are the variability of Coenagrion puellacomplex in Azerbaijan and diagnostic features of two other Coenagrion species closely related to each other, C. ornatum and C. vanbrinkae.