Ior margin feebly triangularly concave centrally, sides notched. Clypeal apex subtrapezoidal (Fig. 6), anterior margin beaded with a small, weakly-developed convexity at middle, surface smooth, coarsely punctate in uneven distribution, confluent or separated by less than 1 puncture diameter. Clypeofrontal suture absent. Vertex with inconspicuous conical convexity at middle of base with apex rounded, punctures on surface shallower and sparser than those on clypeus. Thorax: Outline of pronotum rounded, surface coarsely punctate along side of disc, less dense toward mid-disc; midline moderately indented with shallow and inconspicuous punctures; both sides of midline and area in front of elytral base impunctate with five LIMKI 3 site smaller punctures at anterior end of midline (Fig. 6); disc gradually declined anteriorly when viewed laterally (Fig. 8). Metasternal process poorly developed, narrowly separating middle coxae with anterior margin beaded. Scutellum with scattered secondary punctures, slightly longer than wide medially. 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; interval 4 more convex and wider than others at basal one-fifth, interval 2, 5, and 6 less convex than others (Figs 2, 8). Legs: Protibia with 10 distinct teeth on outer margin, apical 3 teeth protruding, tip of apical tooth downcurved. Male genitalia: Length 1.9 mm. Parameres (Figs 15?6) elongate, dorsal surface concave at basal half when viewed laterally, dorsal margin slightly declined at apical one-third anteriorly (Fig. 20), well sclerotized laterally with medial and apical parts membranous, surface sparsely punctate, glabrous; subequal in length to basal piece. Median lobe (Figs 15?6) trilobate; dorsal sclerite thumb-like with apex slightly swelling; lateral sclerites shorter than dorsal sclerite, broadly AMG9810MedChemExpress AMG9810 crescent-shaped, inwardly curved slightly with tip sharp and highly sclerotized; supporting sclerites L-shaped with central part more sclerotized than lateral side. Internal sac embedded in median lobe. Temones moderately sclerotized, thin and elongate to apical one-third of basal piece (Fig. 15). Basal piece with apical part asymmetrical. Female. Unknown.Chun-Lin Li et al. / ZooKeys 290: 39?4 (2013)Figures 5?2. Dorsal view of head and left oblique view of Bolbochromus spp. 5, 7 B. minutus sp. n., holotype male 6, 8 B. nomurai sp. n., holotype male 9, 11 B. malayensis sp. n., holotype male 10, 12 B. malayensis sp. n., paratype female.Etymology. Bolbochromus nomurai is named after Dr. Sh ei Nomura of the National Museum of Nature and Science, Tokyo, who has always assisted C.-L. Li’s visits to the scarab collections of the museum. Diagnosis. Bolbochromus nomurai is similar to B. plagiatus, but it can be distinguished based on the following combination of characteristics: larger in body size (smaller in B. plagiatus); clypeal apex subtrapezoidal (rounded in B. plagiatus); anterior margin of clypeus with a small, weakly-developed convexity at middle; (anteriorThree new species of Bolbochromus Boucomont (Coleoptera, Geotrupidae, Bolboceratinae)…Figures 13?8. Male genitalia of Bolbochromus spp. 13?4 B. minutus sp. n. 15?6 B. nomurai sp. n. 17?8 B. malayensis sp. n. 13, 15, 17 dorsal view; 14, 16, 18 ventral view. Ds, dorsal sclerite; Ls, lateral sclerite; Ss, supporting sclerite; TE, temones. Scale bar= 0.5 mm.Chun-Lin Li et al. / ZooKeys 290: 39?4 (2013)margin simply beaded i.Ior margin feebly triangularly concave centrally, sides notched. Clypeal apex subtrapezoidal (Fig. 6), anterior margin beaded with a small, weakly-developed convexity at middle, surface smooth, coarsely punctate in uneven distribution, confluent or separated by less than 1 puncture diameter. Clypeofrontal suture absent. Vertex with inconspicuous conical convexity at middle of base with apex rounded, punctures on surface shallower and sparser than those on clypeus. Thorax: Outline of pronotum rounded, surface coarsely punctate along side of disc, less dense toward mid-disc; midline moderately indented with shallow and inconspicuous punctures; both sides of midline and area in front of elytral base impunctate with five smaller punctures at anterior end of midline (Fig. 6); disc gradually declined anteriorly when viewed laterally (Fig. 8). Metasternal process poorly developed, narrowly separating middle coxae with anterior margin beaded. Scutellum with scattered secondary punctures, slightly longer than wide medially. 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; interval 4 more convex and wider than others at basal one-fifth, interval 2, 5, and 6 less convex than others (Figs 2, 8). Legs: Protibia with 10 distinct teeth on outer margin, apical 3 teeth protruding, tip of apical tooth downcurved. Male genitalia: Length 1.9 mm. Parameres (Figs 15?6) elongate, dorsal surface concave at basal half when viewed laterally, dorsal margin slightly declined at apical one-third anteriorly (Fig. 20), well sclerotized laterally with medial and apical parts membranous, surface sparsely punctate, glabrous; subequal in length to basal piece. Median lobe (Figs 15?6) trilobate; dorsal sclerite thumb-like with apex slightly swelling; lateral sclerites shorter than dorsal sclerite, broadly crescent-shaped, inwardly curved slightly with tip sharp and highly sclerotized; supporting sclerites L-shaped with central part more sclerotized than lateral side. Internal sac embedded in median lobe. Temones moderately sclerotized, thin and elongate to apical one-third of basal piece (Fig. 15). Basal piece with apical part asymmetrical. Female. Unknown.Chun-Lin Li et al. / ZooKeys 290: 39?4 (2013)Figures 5?2. Dorsal view of head and left oblique view of Bolbochromus spp. 5, 7 B. minutus sp. n., holotype male 6, 8 B. nomurai sp. n., holotype male 9, 11 B. malayensis sp. n., holotype male 10, 12 B. malayensis sp. n., paratype female.Etymology. Bolbochromus nomurai is named after Dr. Sh ei Nomura of the National Museum of Nature and Science, Tokyo, who has always assisted C.-L. Li’s visits to the scarab collections of the museum. Diagnosis. Bolbochromus nomurai is similar to B. plagiatus, but it can be distinguished based on the following combination of characteristics: larger in body size (smaller in B. plagiatus); clypeal apex subtrapezoidal (rounded in B. plagiatus); anterior margin of clypeus with a small, weakly-developed convexity at middle; (anteriorThree new species of Bolbochromus Boucomont (Coleoptera, Geotrupidae, Bolboceratinae)…Figures 13?8. Male genitalia of Bolbochromus spp. 13?4 B. minutus sp. n. 15?6 B. nomurai sp. n. 17?8 B. malayensis sp. n. 13, 15, 17 dorsal view; 14, 16, 18 ventral view. Ds, dorsal sclerite; Ls, lateral sclerite; Ss, supporting sclerite; TE, temones. Scale bar= 0.5 mm.Chun-Lin Li et al. / ZooKeys 290: 39?4 (2013)margin simply beaded i.
