A monograph on the genus Tetraserica from the Indochinese region (Coleoptera, Scarabaeidae, Sericini) Author Fabrizi, Silvia Author Dalstein, Vivian Author Ahrens, Dirk text ZooKeys 2019 837 1 155 http://dx.doi.org/10.3897/zookeys.837.32057 journal article http://dx.doi.org/10.3897/zookeys.837.32057 1313-2970-837-1 4A18822935804DB7B1229F131F6A0AC8 4A18822935804DB7B1229F131F6A0AC8 Tetraserica bolavensensis sp. n. Figures 41, 46 Type material examined. Holotype: ♂ "Laos, Attapeu prov. Bolavens Plateau, bridge ca. 4 km E TAD KATAMTOK (at light) 15°07.8'N , 106°40.1'E , 260 m Jiri Hajek leg. 11-12.v.2010/ 929 Sericini Asia spec." (NMPC). Paratypes: 8 ♂♂ "Laos, Attapeu prov. Bolavens Plateau, bridge ca. 4 km E TAD KATAMTOK (at light) 15°07.8'N , 106°40.1'E , 260 m Jiri Hajek leg. 11-12.v.2010" (NMPC, ZFMK). Description. Length of body: 8.9 mm; length of elytra: 6.5 mm; maximum width: 5.5 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes small, ratio of diameter/interocular width: 0.48. Ratio of length of metepisternum/metacoxa: 1/1.93. Metatibia short and wide, ratio width/length: 1/2.82; basal group of dorsal spines of metatibia at first third of metatibial length. Aedeagus: Fig. 41 E-G . Habitus: Fig. 41H. Figure 41. A-D Tetraserica pingjiangensis Liu et al., 2014 (holotype) E-H T. bolavensensis sp. n. (holotype) I-L T. nakaiensis sp. n. (holotype) A, E, I aedeagus, left side lateral view C, G, K aedeagus, right side lateral view B, F, J parameres, dorsal view D, H, L habitus. Scale bars: 0.5 mm. Habitus not to scale. Female unknown. Variation. Length of body: 8.6-8.9 mm; length of elytra: 6.1-6.8 mm; maximum width: 5.3-5.9 mm. Diagnosis. Tetraserica bolavensensis sp. n. differs from the similar T. latefemorata Kobayashi, 2017 by the right paramere being half as long as left paramere and the deep split between lobes of right parameres; also the dorsal lobe is not reduced in size. Etymology. The new species is named after the type locality, Bolavens Plateau (adjective in the nominative singular).