Insects are beneficial in many areas such as pollination of plants, neutralization of pests, control of pest population and production of useful material including food for humans. In applied entomology, insects are beneficial for the ecosystem and sustainable agriculture. Biological control using parasitoids is one of the applications known worldwide. Another very interesting use is the study of insects associated with a corpse: science known as forensic entomology. This study was carried out to analyze the succession of necrophagous insects. The objective is to show their chronology, which could be used to estimate the post mortem interval (PMI) in Burundi, a country of the African Great Lakes region where corpses are frequently found in the forests. Analysis of the results revealed that two species of social insects belonging to the order of hymenoptera namely Monomoriun pharaonis and Leptothorax acervorum arrive early on the corpse. These results could be explained in three ways: the chemical reception of social insects of the order hymenoptera illustrated by the smell of gases from the degradation and decomposition of the corpse, but also behavior and communication of social insects.