Aded. Scutellum slightly longer than wide medially, surface with 5 coarse punctures and scattered secondary punctures,. Elytron: With 7 striae between suture and humeral umbone, stria 2 interrupted by stria 1 not reaching base, stria 5 terminating at basal one-ninth; width of interval 3 and 4 same at basal one-fifth with interval 2, 5 and 6 less convex than others (Figs 3, 11). Legs: Protibia with 10 distinct teeth on outer margin, apical 3 teeth protruding, tip of apical tooth curved outwardly. Male genitalia: Length 1.7 mm. Parameres (Figs 17?8) elongate, dorsal margin slightly declined at basal one-fifth, becoming more declivous at apical one-fourth (Fig. 21), well sclerotized laterally with apical part membranous, surface almost impunctate, glabrous; subequal in length to basal piece. Median lobe (Figs 17?8) trilobate; dorsal sclerite vertically bilobed with apex notched; lateral sclerites elongate, equal in length to dorsal sclerite, overall highly sclerotized, apex tufted with 4 robust setae (Fig. 22); supporting sclerites kidney-shaped, evenly sclerotized. purchase Biotin-VAD-FMK Internal sac embedded in median lobe. Temones membranous, thin and elongate to apex of basal piece (Fig. 17). Basal piece with apical portion asymmetrical. Paratype female (Fig. 4, 10, 12). Similar to holotype male with minor differences of lighter body color, secondary punctures on pronotum and scutellum, smaller eyes, larger brownish yellow marking of elytra and robust protibial teeth. Diagnosis. Bolbochromus malayensis is similar to B. masumotoi, but it can be distinguished based on the following combination of characteristics: smaller in body sizeThree new species of Bolbochromus Boucomont (Coleoptera, Geotrupidae, Bolboceratinae)…(B. masumotoi with larger; body length >8.0 mm); clypeal apex trapezoidal (rounded in B. masumotoi); vertex with an inconspicuous carina at middle of base (a tubercle at center of frontal disc in B. masumotoi); pronotal marking rounded (triangular in B. masumotoi); punctures on pronotum coarse and moderately dense (fine and sparse in B. masumotoi); pronotum smoothly declined anteriorly (steeply declined in B. masumotoi); elytral striae coarsely punctate (finely punctate in B. masumotoi); elytral intervals varying in degree of convexity (evenly convex in B. masumotoi); elytral markings across interval 2?, transversely irregular (markings across intervals 4?, shape rounded in B. masumotoi); dorsal sclerite of median lobe widened (narrow in B. masumotoi). Etymology. Bolbochromus malayensis is the first species of the genus described from the Malay Peninsula, and the species epithet is derived from its locality. Remarks. The holotype and paratype of Bolbochromus malayensis were collected by a flight interception trap, which is an effective method for collecting Bolbochromus adults. A series of papers by Hanski and Krikken (1991), Davis (2000), Davis et al. (2001), and Li et al. (2008) demonstrated that flight interception traps are highly effective for collecting forest-dwelling bolboceratine scarabs.Acknowledgments We are grateful to Alexey Solodovnikov (Zoological Museum of the University of Copenhagen, Copenhagen, Denmark) and Sh ei Nomura (National Museum of Nature and Science, Tokyo, Japan) for lending valuable specimens used in this work and for their longterm LIMKI 3 supplier assistance to C.-L. Li. We also thank Denis Keith (Mus m d’Histoire Naturelle et de Pr istoire, Chartres, France) for providing valuable photographs of the type of Bolboceras plagiatus.Aded. Scutellum slightly longer than wide medially, surface with 5 coarse punctures and scattered secondary punctures,. Elytron: With 7 striae between suture and humeral umbone, stria 2 interrupted by stria 1 not reaching base, stria 5 terminating at basal one-ninth; width of interval 3 and 4 same at basal one-fifth with interval 2, 5 and 6 less convex than others (Figs 3, 11). Legs: Protibia with 10 distinct teeth on outer margin, apical 3 teeth protruding, tip of apical tooth curved outwardly. Male genitalia: Length 1.7 mm. Parameres (Figs 17?8) elongate, dorsal margin slightly declined at basal one-fifth, becoming more declivous at apical one-fourth (Fig. 21), well sclerotized laterally with apical part membranous, surface almost impunctate, glabrous; subequal in length to basal piece. Median lobe (Figs 17?8) trilobate; dorsal sclerite vertically bilobed with apex notched; lateral sclerites elongate, equal in length to dorsal sclerite, overall highly sclerotized, apex tufted with 4 robust setae (Fig. 22); supporting sclerites kidney-shaped, evenly sclerotized. Internal sac embedded in median lobe. Temones membranous, thin and elongate to apex of basal piece (Fig. 17). Basal piece with apical portion asymmetrical. Paratype female (Fig. 4, 10, 12). Similar to holotype male with minor differences of lighter body color, secondary punctures on pronotum and scutellum, smaller eyes, larger brownish yellow marking of elytra and robust protibial teeth. Diagnosis. Bolbochromus malayensis is similar to B. masumotoi, but it can be distinguished based on the following combination of characteristics: smaller in body sizeThree new species of Bolbochromus Boucomont (Coleoptera, Geotrupidae, Bolboceratinae)…(B. masumotoi with larger; body length >8.0 mm); clypeal apex trapezoidal (rounded in B. masumotoi); vertex with an inconspicuous carina at middle of base (a tubercle at center of frontal disc in B. masumotoi); pronotal marking rounded (triangular in B. masumotoi); punctures on pronotum coarse and moderately dense (fine and sparse in B. masumotoi); pronotum smoothly declined anteriorly (steeply declined in B. masumotoi); elytral striae coarsely punctate (finely punctate in B. masumotoi); elytral intervals varying in degree of convexity (evenly convex in B. masumotoi); elytral markings across interval 2?, transversely irregular (markings across intervals 4?, shape rounded in B. masumotoi); dorsal sclerite of median lobe widened (narrow in B. masumotoi). Etymology. Bolbochromus malayensis is the first species of the genus described from the Malay Peninsula, and the species epithet is derived from its locality. Remarks. The holotype and paratype of Bolbochromus malayensis were collected by a flight interception trap, which is an effective method for collecting Bolbochromus adults. A series of papers by Hanski and Krikken (1991), Davis (2000), Davis et al. (2001), and Li et al. (2008) demonstrated that flight interception traps are highly effective for collecting forest-dwelling bolboceratine scarabs.Acknowledgments We are grateful to Alexey Solodovnikov (Zoological Museum of the University of Copenhagen, Copenhagen, Denmark) and Sh ei Nomura (National Museum of Nature and Science, Tokyo, Japan) for lending valuable specimens used in this work and for their longterm assistance to C.-L. Li. We also thank Denis Keith (Mus m d’Histoire Naturelle et de Pr istoire, Chartres, France) for providing valuable photographs of the type of Bolboceras plagiatus.