THORAX OF AN ISECT IS BASED ON SEGMENTAL PLAN AND IS DIVIDED INTO (A) PROTHORAX (B) MESOTHORAX (C) META THORAX DORSALLY ITS COVERED BY TERGUM, VENTRALLY BY STERNUM AND LATERALLY BY PLEURON IN WINGLESS INSECT THE STRUCTURE OF THORAX IS SOME WHAT DIFFERENT FROM WING BEARING INSECTS