Russia is very big. It consists of a number of zones, with the Far Eastern zone being a region in which the indigenous bee is Apis cerana. Varroa destructor is a natural parasite of Apis cerana.
Apis mellifera carnica, or the Carniolan bee is a truly beautiful bee. This type f bee is native to Bulgaria, Croatia, Bosnia Herzegovina, Bulgaria, Slovenia, and Romania.
There is a lot of debate about this. Some forums insist that Russian bees are really just Apis mellifera caucasia bees. The scientific evidence suggests they are different, being more similar but distinct from Apis mellifera caucasia.