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• Taxonomic accounts
• Family Histeridae Gyllenhal, 1808
• Subfamily Niponiinae Fowler, 1912 뿔풍뎅이아과 (신칭, newly added)
• Genus Niponius Lewis, 1885 (newly added)
• Niponius osorioceps Lewis, 1885 두뿔풍뎅이붙이 (신칭)
• Subfamily Abraeinae Marseul, 1857
• Plegaderus (Plegaderus) marseuli Reitter, 1877 두가슴풍뎅이붙이 (신칭)
• Subfamily Trypeticinae Bickhardt, 1913 각진풍뎅이붙이아과 (신칭, newly added)
• Genus Trypeticus Marseul, 1864 (newly added)
• Trypeticus fagi (Lewis, 1884) 가슴각진풍뎅이붙이(신칭)
• Acknowledgments

 Histeridae is a family of beetles commonly known as clown beetles or hister beetles and approximately 3,900 species in 11 subfamilies have been described to date. In Korea, up to days, 53 species of 22 genera of 6 subfamilies of them have been recorded (Kim & Lim, 1997; Ôhara & Paik, 1998). They can be easily identified by their shortened elytra which leave one or 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 funnel trap for the ecological research on the bark beetles. As a result, we added three species, Niponius osorioceps Lewis, 1885, Plegaderus (Plegaderus) marseuli Reitter, 1877 and Trypeticus fagi (Lewis, 1884) new to Korea. In this paper, diagnosis and photographs of characters for each species are presented.

Taxonomic accounts

Family Histeridae Gyllenhal, 1808

 Key to the Korean subfamilies of Histeridae (Number of species in Korea)

1. Prosternum without antennal grooves or cavities. Ventral side of head with large foveae for reception of antennae. Mandibles vertically connected with head. ······················································ Subfamily Niponiinae (1 species)
- Prosternum with antennal grooves or cavities. Ventral side of head without foveae(Except in Tribes Hololeptini and Histerini, which have shallow and narrow longitudinal grooves). Mandibles porrect, horizontally connected with head.··································································· 2
2. Antennal grooves or cavities on prosternum transverse, occurring on anterior side, and usually closed beneath by the prosternal alae. ······················································ 3
- Antennal grooves on prosternum longitudinal, usually sinuated next to prosternal keel, and open beneath. ···· 5
3. Labrum with a few setiferous punctures. ··················································· Subfamily Onthophilinae (2 species)
- Labrum without setae. ·················································· 4
4. Antennal scape expanded and strongly angulate. ·········································· Subfamily Hetaeriinae (1 species)
- Antennal scape normal, neither expanded nor strongly angulate. ·················· Subfamily Histerinae (33 species)
5. Prosternal lobe present. ············································································ Subfamily Dendrophilinae (4 species)
- Prosternal lobe absent. ·················································· 6
6. Body cylindrical. ·························································································· Subfamily Trypeticinae (1 species)
- Body oval or oblong-oval ············································ 7
7. Dorsal elytral striae absent though sometimes represented by rather vague impressions. ············································································ Subfamily Abraeinae (2 species)
- Dorsal elytral striae present. ·············································································· Subfamily Saprininae (12 species)

Subfamily Niponiinae Fowler, 1912 뿔풍뎅이아과 (신칭, newly added)

Genus Niponius Lewis, 1885 (newly added)

 Niponius Lewis, 1885. [Type species: Niponius impressicollis Lewis, 1885]

Niponius osorioceps Lewis, 1885 두뿔풍뎅이붙이 (신칭)

 Niponius osorioceps Lewis, 1885. Trans. Ent. Soc. London:333. [Type locality: Japan]
Niponius itoi Chûjô, 1955. Akitu, 4: 57; Ôhara, 1999.

 Diagnostic characters. Body length 3.5-4.7 mm. Body cylindrical, moderately stout. Cuticle shining, black; tarsi, antennae and projections of epistoma reddish brown. Projections of epistoma moderately stout and long, their apices strongly carinate and dorsal surface with 2 transverse carinae. Antennal grooves deep under eyes. Gena under compound eye straightly edged. Mandible big and stout; underside of mandible concave and hide maxilla and maxillary palpi. Propygidium with 2 large, transversely oblong and shallow foveae which become shallower posteriorly. Pygidium with large, longitudinal oblong and deep foveae behind each basal corner.

 Distribution. Korea, Japan, Taiwan, Ussuriyskij Kray.

 Material examined. GW, 2 exs., Janghak-ri, Dong-myeon, Chuncheon-si, 17.V.-14.VI.2011 (Lindgren funnel trap); GW, 2 exs., Joyang-ri, Dongsan-myeon, Chuncheon-si, 17.V.-14.VI.2011(Lindgren funnel trap), GW, 30 exs., Jeombong-san, Girin-myeon,Inje-gun, 2.VI-22.VI.2011 (Lindgren funnel trap).

Subfamily Abraeinae Marseul, 1857

 Tribe Plegaderini Portevin, 1929 (newly added)
Genus Plegaderus Erichson, 1834
Plegaderus Erichson, 1834. [type species: Hister caesus Herbst,1792]

Plegaderus (Plegaderus) marseuli Reitter, 1877 두가슴풍뎅이붙이 (신칭)

 Plegaderus (Plegaderus) marseuli Reitter, 1877. Berlin Ent. Z.,21: 371. [Type locality: Japan]

 Diagnostic characters. Body length 1.40-1.52mm. Body oblongoval. Cuticles shining and black; tibiae, tarsi and antennae reddish brown. Head with a convex area behind each antennal cavity. Antennae inserted on the frons between compound eyes. Pronotum strongly convex; anterior margin broadly emarginate, with a complete marginal stria, Surface of pronotum divided into 2, anterior and posterior, areas by a transverse line at apical 1/3. Epipleura not concave. Elytra without striae, but oblique humeral stria deeply impressed. Propygidium and pygidium punctuate regularly. Foretibia slightly broadened anteriorly but progressively broader on apical 1/2.

 Distribution. Korea, Japan.

 Material examined. GW, 4 exs., Janghak-ri, Dong-myeon, Chuncheon-si, 17.V.-14.VI.2011 (Lindgren funnel trap).

 Remarks. This tribe is easily distinguished from tribe Abraeini with a transverse line on middle or near middle of pronotum.

Subfamily Trypeticinae Bickhardt, 1913 각진풍뎅이붙이아과 (신칭, newly added)

Genus Trypeticus Marseul, 1864 (newly added)

 Trypeticus Marseul, 1864. [Trype spcies: Trypeticus gilolous Marseul, 1864]

Trypeticus fagi (Lewis, 1884) 가슴각진풍뎅이붙이(신칭)

 Tryponaeus fagi Lewis, 1884, Ann. Mag. Nat. Hist., (5) 13: 138. [Type locality: Japan]

Trypeticicus fagi : Lewis, 1905. A systematic catalogue of Histeridae, London: 7. 

 Diagnostic characters. Female: Body length 3.11-4.30mm. Body cylindrical, moderately stout. Cuticle shining, black; tibiae, tarsi, and antennae dark reddish brown. Head with clear frontal marginal stria which is strongly carinate; pronotum distinctly with short costa longitudinally in the middle at basal ¼. Pronotum strongly punctate wholly; humeral part strongly angulate; punctuation of anterior part small but long. Punctation of pygidium much denser than that of the male. Front and mid tibia with 5-6 big teeth on outer margin. Male: Body length 3.11-3.50 mm. Head without frontal stria; surface slightly depressed on median area. Anterior margin of pronotum shallowly emarginate on median 2/3; surface of disk densely and coarsely punctuate except on longitudinal mid line. Epipleura broad, not concave. Marginal epipleura and elytral stria absent. Distribution. Korea, Japan.

 Material examined. GW, 1 ex., Janghak-ri, Dong-myeon, Chuncheon-si, 17.V.-14.VI.2011 (Lindgren funnel trap); GW, 1 ex., Joyang-ri, Dongsan-myeon, Chuncheon-si, 17.V.-14.VI.2011 (Lindgren funnel trap).

Fig. A-E. Habitus of Niponius osorioceps Lewis; Scale bar = 1 mm. A: Dorsal aspect, B: Lateral aspect, C: Head, D: Scutellum, E: 6-7^th Tergites.

Fig. F-J. Habitus of Plegaderus (Plegaderus) marseuli Reitter; Scale bar = 1 mm. F: Dorsal aspect, G: Lateral aspect, H: Antero-lateral part of pronotum, J: Scutellum. Left Antenna, I:Antero-lateral part of pronotum, J: Scutellum.

Fig. K-N. Habitus of Trypeticus fagi (Lewis, 1884) (Female; Scale bar = 1 mm). K: Dorsal aspect, L: Lateral aspect, M: Head, N: Scutellum.

Acknowledgments

This work was supported partly by the National Project of the Biological Collections in the Korean Peninsula in 2011 of the Korea National Arboretum.