oa Journal of the Entomological Society of Southern Africa - On some intrinsic and environmental factors controlling the distribution of dragonflies (Odonata), with redescription and a new name for a little known species



Every collector and every systematist must have wondered at some time or other why one species in the group which he is collecting or studying is common, and other species, close in every respect to the first, are extremely rare, although belonging perhaps to the same genus and distinguishable from the common species only by minor, or even microscopic details.


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