The description of Eriophyes dryadis Roiv. is supplemented: male and juvenile instars i.e. nymph I and nymph II are described. Some new morphometric data are given. Characteristics of 3 local populations (2 from Yugoslavia and one from Switzerland) are compared with the original description. Actual and past (Pleistocoenic) distribution of host plant Dryas octopetala L. as well as a distribution of eriophyid mite Eriophyes dryadis is presented. An explanation based on arctic-alpine disjunction is given.
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