Histeridae is a family of beetles commonly known as clown beetles and hister beetles and approximately 3,900 species in 11 subfamily have been described to date. In Korea, up to days, 53 species of 22 genera of 6 subfamily of them have been recorded. They can be easily identified by their shortened elytra that leaves two of the seven tergites exposed, and their elbowed antennae with clubbed ends. Most members of hister beetles are predators and found in most kinds of decaying organic matter, such as droppings, decomposing bodies of animals, compost piles and other decaying plant materials. Some species are also used to control livestock pests that infest dung or to control house flies (Ôhara, 1994).
Recently, we have collected several histerid species with Lindgren funner trap for the ecological research on the bark beetles. As a result of this study, we added three newly recorded species, Niponius osorioceps Lewis, 1885, Plegaderus (Plegaderus) marseuli Reitter, 1877 and Trypeticus fagi (Lewis, 1884) to Korean fauna. In this presentation, diagnosis and photographs of characters for each species are presented.