Redefinition of Liroetis, with descriptions of two new species and an annotated list of species (Coleoptera: Chrysomelidae: Galerucinae) Author Bezděk, Jan text Acta Entomologica Musei Nationalis Pragae 2021 2021-12-31 61 2 529 614 journal article 10.37520/aemnp.2021.030 1804-6487 5821367 06FDFB43-0B61-4DA8-B260-D78ABD62756C Liroetis tsoui (Lee, 2016) comb. nov. ( Figs 196 , 207 , 218 , 257–260 ) Siemssenius tsoui Lee, 2016: 380 (original description). Type locality. ‘[ Taiwan :] New Taipei city , Hsinhsien’. Type material examined. Pൺඋൺඍඒඉൾඌ: 1 J ( Figs 257–258 ), ‘ Taiwan : Taipei (22759) / Tsaikungkengshan ([in Chinese]) / 02.V.2012 , leg. S.- F. Yu [w, p] // Paratypus / Siemssenius / tsoui sp. nov. [p] J [h] / des. C.-F. Lee, 2016 [pink label, p]’ ( JBCB ); 1 ♀ ( Figs 259–260 ), ‘ Taiwan : Taipei / Erhtzuping ([in Chinese]) / 29.IV.2016 , leg. C.-F. Lee [w, p] // Paratypus / Siemssenius / tsoui sp. nov. [p] ♀ [h] / des. C.-F. Lee, 2016 [pink label, p]’ ( JBCB ). Diagnosis. Colouration . Body black, except for reddish brown elytra and abdomen. Body length . J: 10.0 mm, ♀ : 11.1 mm . Male ( Fig. 257 ). Antennae 0.95 times as long as body. Pronotum convex, 1.71 times as wide as long, very finely punctate, anterior margin nearly straight, unbordered, posterior margin moderately rounded, thinly bordered, lateral margins slightly convergent in posterior two thirds, anterior third rounded and more distinctly convergent, with wider border. Protarsomere I elongate, subtriangular. Metatibial spur short, robust, subtubular, with transversely cut apex. Aedeagus ( Fig. 196 ). Median lobe of aedeagus 3.68 times as long as wide, with apical process narrow, separated from lateral elevations by V-shaped incisions, rest of median lobe subparallel. Lateral view: median lobe bisinuate, very narrow in middle part; lateral elevation quadrangular, placed in anterior fifth of aedeagus length. Dorsal process 5.31 times as long as wide, 0.83 times as long as median lobe, lanceolate. Lateral view: dorsal process widely regularly rounded, apical half slightly wider, apex sharp. Female ( Fig. 259 ). Antennae shorter, 0.75 times as long as body. Protarsomeres narrower than in males. Metatibial spur short, narrow, with moderately rounded apex. Sternite VIII heart-shaped, posterior margin rounded with shallow emargination in middle, surface laterally with two elevated plates, long setae accumulated along posterior and inner margins of those plates, tignum short, 0.30 times as long as sternite VIII, slightly asymmetrical to right ( Fig. 218 ). Spermatheca with poorly developed nodulus, cornu C-shaped, spermathecal duct slightly bent ( Fig. 207 ). Differential diagnosis. Having black body and reddish brown elytra and abdomen, Liroetis tsoui is very similar to other Taiwanese species L. jungchani , L. liui , L. rufipennis , and L. yuae . These species can be reliably identified only based on the structure of aedeagus ( Figs 189–190 , 194, 196–197 ). Median lobe of aedeagus of L. tsoui has apical process extremely short, lateral elevation large, quadrangular, dorsal process moderately lanceolate and in lateral view distictly extended subapically ( Fig. 196 ). Host plants. Caprifoliaceae : Lonicera hypoglauca Miq. , Saxifragaceae : Hydrangea angustipetala Hayata (Lൾൾ 2016). Distribution. Taiwan (Lൾൾ 2016).