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 cattienensis sp. n. Figures 22, 46 Type material examined. Holotype: ♂ "Museum Leiden Viet Nam (Dong Nai Prov.) Cat Tien NP: Ficus trail. 9-26.iv.2007. leg. May Phu Quy, Nguyen Than Mahn/ humid lowland forest; in malaise traps; 250 m 11°26'20, 6"N, 107°25'42"E" (RMNH). Paratypes: 1 ♂ "Museum Leiden Viet Nam (Dong Nai Prov.) Cat Tien N.P.: Ficus trail. 9-26.iv.2007. leg. May Phu Quy, Nguyen Than Mahn/ humid lowland forest; in malaise traps; 250 m 11°26'20, 6"N, 107°25'42"E" (ZFMK), 1 ♂ "Museum Leiden Viet Nam (Dong Nai Prov.) Cat Tien N.P.: Ficus trail. 10.iv-15.v.2007. Leg. May Phu Quy, Nguyen Than Mahn/ humid lowland forest; in malaise traps; 250 m. 11°26'20, 6"N, 107°25'42"E" (RMNH), 1 ♂ "S Vietnam, 1-5.5.1994 Nam Cat Tien Nat. park P. Pacholatko & L. Dembicky leg./ coll. P. Pacholatko /VS 118" (CPPB). Description. Length of body: 8.4 mm; length of elytra: 6 mm; maximum width: 5 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes moderately large, ratio of diameter/interocular width: 0.67. Ratio of length of metepisternum/metacoxa: 1/1.61. Metatibia short and wide, ratio width/length: 1/2.35; basal group of dorsal spines of metatibia at first third of metatibial length. Aedeagus: Fig. 22 A-C . Habitus: Fig. 22D. Figure 22. A-D Tetraserica cattienensis sp. n. (holotype) E-H T. multiangulata sp. n. (holotype) A, E aedeagus, left side lateral view C, G aedeagus, right side lateral view B, F parameres, dorsal view D, H habitus. Scale bars: 0.5 mm. Habitus not to scale. Female unknown. Variation. Length of body: 7.9-8.4 mm; length of elytra: 5.9-6 mm; maximum width: 4.9-5.0 mm. Diagnosis. Tetraserica cattienensis sp. n. differs from all other Tetraserica species in having a straight or slightly convex posterior margin of the metafemur, small eyes, and the short median phallobasal lamina being half as long as phallobase. From the similar T. bansanpakiana sp. n. and T. margheritae sp. n., T. cattienensis sp. n. differs by the robust spines on the ventral margin of metatibia being subequal in length. Etymology . The new species is named after the type locality, Cat Tien NP (adjective in the nominative singular).