“…Their nests are most often built in preexisting cavities; however, wasps of many species gnaw out their own nest tunnels in the soil or construct nests of mineral or plant material on the surface of the substrate (Spradbery, 1973;Iwata, 1976;Cowan, 1991). The known fauna of Crimea includes 76 species of Eumeninae (Fateryga, 2010); the nesting biology of 20 species was studied in detail in this region (Ivanov and Fateryga, 2003Ivanov et al, 2005aIvanov et al, , 2005bFateryga, 2009Fateryga, , 2012aFateryga, , 2012bFateryga, , 2012cFateryga, , 2013aFateryga, , 2013bIvanov, 2009, 2013;Fateryga and Matushkina, 2010;. Cuckoo wasps were listed among the nest parasites of only six of them Fateryga, 2004, 2006;Fateryga, 2009Fateryga, , 2012aIvanov, 2009, 2013), and these were not always identified to species.…”