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The species Apis mellifera L. has a quite unusually large area of distribution. It extends from Southern Scandinavia in the North to the Cape of Good Hope in the South, from Dakar in the West to the Urals, Mashad and to the coast of Oman in the East. It was experimentally shown that it is in fact a single species, as all the different types from this enormous region, comprising the whole western part of the Old World, interbreed with full fertility. It is evident that the different types originated by geographic isolation and ecological adaptations. They were partly described as early as the beginning of the l9th century, but this gave rise to quite a lot of confusion due to the lack of definition

BIOMETRICAL-STATISTICAL ANALYSIS OF THE GEOGRAPHIC VARIABILITY OF APIS MELLIFERA L. I. Material and Methods