Taxonomy and biology of leafhoppers of the genus Macropsis (Homoptera, Cicadellidae, Macropsinae) living on Berberis spp. (Berberidaceae)

Two Berberis-dwelling Macropsis species, M. berberidis Dub., 1966 and M. berberidicola Dub., 1966 from the West Tien Shan Mountains are redescribed. Macropsis berberidis arkytica Tishetshkin ssp. n., M. berberidis pallidicephala Tishetshkin ssp. n., and M. berberidicola narynensis Tishetshkin ssp. n. are described, the data on their host specialization, male calling signals, and distribution are provided. In spite of identical ecological preferences, the two species were never found in the same locality. Such vicariance appears to be the result of similarity of their signal pattern and competition for acoustic communication channels.