Prothoracic Legs of 3 Assassin Bugs (IMAGE) Entomological Society of America Caption These are the prothoracic legs of S. incognita (top), S. complexa (middle), and S. integra (bottom). Notice the difference in thickness of the femora. Credit Entomological Society of America Usage Restrictions Credit the Entomological Society of America License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.