During the months of May, June and July, a large sample of necrophageous and carnivorous beetles has been collected in four forests (Belgium, area of Haute-Ardenne, Province of Liège) represented respectively by two beech-grove, an oak plantation
and a spruce forest. The 1376 beetles collected belong to six families and 32 species. Thanks to the establishment of a coefficient of similarity, based on the quantitative analysis of the entomocenosis common to the 4 forest habitats, ties of ecological
affinity between the different habitats have been cleared. Those coefficients of similarity, put up graphically (entomographics) prove that there exist ties of affinity between the beech forest and the picea forest, the oak forest being separated of those 3