Abstract: Features of some sensory structures including sensory nodules and sensorypits of adults of 18 species belonging to 11 genera and their nymphs of 2 species ofTingidae (Hemiptera- Heteroptera ) are observed under the scanning electron microscope and compared among the genera. Based on the main features of the sensorystructures observed, the 11 genera under observation are differentiated into 6groups. Taxonomic significance of the differences of the sensory structures ingeneric level are further provided. These differences are considered to be new anduseful features in identification of the genera, and also of reference values in thatof some species within each genus. Phylogenetic development of the sensory structures of tingid insects are investigated and some proposals are made.

Key words: Tingidae, body surface, sensory structures, scanning electron micro- scope