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Hemimeridae (earwigs; class Insecta, order Dermaptera) Family of earwigs which are well adapted as ectoparasites. They are flattened and streamlined, with specially modified tarsal segments with which they grip the fur of their hosts. They are wingless and blind, with rod-like forceps. There are about 10 species, all of which live in the fur of a particular species of Cricetomys (giant rat), in southern Africa.