Methodology for detailed dissections of the phylogenetically most informative structures from adult aleocharine staphylinid beetles is provided. These methods include specimen preparation, relaxation, clearing, bleaching, dehydration and full dissection. A detailed summary of mouthpart and male and female genitalic dissections is provided. Recently described character systems, including those of the mouthparts and the thoracic regions, have been successfully used in phylogenetic studies of aleocharine staphylinids. This paper provides the first thorough description of the techniques necessary to reveal these character systems.