Freshwater is a very important complement for the ecosystem. While it contains macroinvertebrates such as insects, prokaryotes as bacteria and microinvertebrates such as zooplankton, biotic factors such as plants; water, metal ions and colloidal particles form abiotic factors. Because of attracting attention in terms of number and variety, aquatic insects are the pivol of freshwater. In this context; some differences in measurements were evaluated by considering sexual dimorphism, some structural disorders and gender-developmental stages at our study. Results are believed that the developmental stages and sexual dimorphism size differences will be important data for future ecological and evolutionary studies.