This paper concerned the observations carried out at 15 plots in the primary, secondary and artificial forests in Xishuangbanna in 1987-1988 on the species,the population communities and the structure of hemipterous insects under the influence of human activities, such as lumbering and firing. The insect samples were collected in dry (January,May) and rainy (August) seasons. This] work will provide a foundation for the futher research on the ecosystem of tropical forests and conservation of natural resource...