Sobre os tipos de Acrosternum impicticorne (Stal, 1872), Acrosternum herbidus (Stal, 1859) e Acrosternum vicinus (Berg, 1892) (Heteroptera; Pentatomidae)

The study of the type specimens of Acrosternum herbidus (Stal, 1859),Acrosternum impicticorne (Stal, 1872) and Acrosternum vicinus (Berg, 1892) was made in order to establish the proper taxonomic status of these species; A. vicinus is here considered to be a synonym of A. impicticorne