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Summary
An analysis was made of morphometric differences between complementary antennae of females of three Culicoides species: C. pulicaris, C. punctatus and C. impunctatus. Greater bilateral symmetry was found between compound lengths e.g. total length, length of segments 3–10, than between individual segment lengths, suggesting control by a homeostatic mechanism.
Hypotheses are proposed for the embryological origin and functional significance of this phenomenon. The taxonomic significance of the results is discussed.