A review of the neptis species group of the genus Lilioceris (Coleoptera: Chrysomelidae: Criocerinae) Author Xu, Yuan Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China & College of Life Science, University of Chinese Academy of Sciences, Beijing 100049, China Corresponding author, E-mail: lianghb @ ioz. ac. cn Author Xiong, Yun Gongshan Protection Sub-Bureau, Gaoligongshan National Nature Reserve, Gongshan 673500, Yunnan, China Author Liang, Hongbin Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China text Zoological Systematics 2021 46 4 300 316 http://zoobank.org/511cffe2-ed49-4c53-9e66-c431c944ed88 journal article 10.11865/zs.2021404 2095-6827 7176018 511CFFE2-ED49-4C53-9E66-C431C944ED88 Lilioceris subpolita ( Motschulsky, 1861 ) ( Figs 2 , 11–12 , 19 , 23 , 29 ) Crioceris subpolita Motschulsky, 1861: 22 (Siberia) Lilioceris subpolita : Heinze, 1943: 103 Material examined. Total 14 specimens . Russia : one specimen ( BMNH , sex undetermined), SYN-TYPE / Type , Motschulsky [in Baly's handwriting] / Crioceris subpolita Motsch, Siberia ; Japan : 2♂ , Minomo , Osaka / 1932.VIII.3 , S. YIE ; 1♂ , Mont Takao / Pres. Hachioji / Japan , 1930.V.9 , Edme-Gallois; 2♀ , MINOMO OSAKA / 1932.VIII.3 , S. YIE coll .; 2♀ , Mont Takao / Pres. Hachioji , Japan / 2008.VI.1 , Edme-Gallois; 1♀ , Mt. Takao / 1932.VI.11 ; 2♀ , Nippon Moyen / Env. De. Tokio / Et Alpes De Nikko / J. Harmand , 1901 ; 1♀ , Jozankei / 1924.VIII / Y. Ouchi ; 1♀ , Japan / D.E.N.M / Crioceris subpolita Motsch ; 1♀ ( MBSU ), Mozi Kyusyu , Japan , 1938.IV. 30 , H. Okawa / Crioceris subpolita Motschulsky, Det M. Chujo / En-077528, MBSU . Diagnosis. Femora black; antennomeres 5–10 twice as long as wide; pronotal disc with sparse fine punctures; elytral punctures large at base, diminishing posteriorly, sparse or absent in apex; apex of mesoventral process slightly widened. Redescription. BL 7.0–12.0 mm, BW 3.3–4.2 mm . Head, antennae, scutellum prosternum, mesoepisternum, mesoepimeron, metaepisternum, lateral sides of mesoventral, lateral sides of sternite, and legs black, remainders brownish red. Figures 11–14. Habitus of Lilioceris spp. 11–12. L. subpolita , ♂, Japan (Osaka: Minomo); 13–14. L. vietnamica , ♂, China (Yunnan: Menghai). 7, 9. Dorsal view. 8, 10. Ventral view. Scale bars =5.0 mm. Figures 15–19. Pronotum, mesoventral process and metaventrite of Lilioceris spp. 15. L. vietnamica , ♂, China (Yunnan: Menghai). 16. L. cantonensis , ♂, China (Zhejiang: Tianmu Shan). 17. L. fouana , ♂, China (Sichuan: Luding). 18. L. neptis , ♀, China (Hong Kong: Honghualing). 19. L. subpolita , ♂, Japan (Osaka: Minomo). A. Pronotum. B. Mesoventral process. C. Metaventral disc. Figures 20–24. Male genitalia of Lilioceris spp. 20. L. cantonensis , China (Zhejiang: Tianmu Shan). 21. L. neptis , China (Fujian: Dehua). 22. L. vietnamica , China (Yunnan: Menghai). 23. L. subpolita , Japan (Osaka: Minomo). 24. L. fouana , China (Sichuan: Luding). A. Aedeagus, lateral view. B. Aedeagus, dorsal view. C. Dorsal sclerite, dorsal view. D. Sclerites in internal sac, lateral view. Scale bars: A–B =0.5 mm; C–D =0.2 mm. Head ( Figs 2 , 11–12 ). HL/HW 1.1–1.3; vertex with a deep groove in middle, punctate and setose laterally; occiput with a shallow furrow medially, densely punctate; frontal tubercle glabrous, slightly raised; frontoclypeal area triangular, disc with punctures and setae laterally; labrum transverse, with long setae; antennae filiform, nearly half as long as body length, antennomeres 1–4 nearly globular, 2 shortest, 5–10 each cylindrical, twice as long as wide; antennomeres 1–2 sparsely pubescent and punctate, 3–11 densely pubescent and punctate. Pronotum ( Figs 2 , 11 , 19A ). PW/HW 1.1–1.2, PL/PW 1.0–1.2; anterior angle protruding, posterior angle not protruding; side constricted in middle; disc with sparse fine punctures; anterior and posterior transverse impression absent, basal transverse groove weak. Scutellum triangular and densely pubescent. Elytra ( Figs 2 , 11 ). EL/EW 2.1–2.2; sutural angle rounded; humeri protruding, humeral groove distinct, basal impression distinct; intervals with sparse fine punctures; strial punctures sparse, coarse at base, diminishing posteriorly, much sparser or absent at apex, scutellary striole composed of 2–5 punctures; epipleura with upper margin strongly raised, with a row of fine punctures laterally. Mesoventrite pubescent; apical portion of mesoventral process slightly widened apically, convex, tuberculate, horizontally connected with metaventrite ( Fig. 19B ); metaventral disc with a long arcing setose area, extending from posterior margin to anterior margin ( Fig. 19C ); metepisternum densely pubescent. Abdominal sternite with setae and punctures, transverse impressions distinct on sternites 2–5, with dense punctures and pubescence. Legs slender; tibiae with dense punctures, pubescence and two spurs; femora with dense pubescence on dorsal surface, with sparse setae on ventral surface. Male genitalia ( Figs 23A–D ). Median foramen occupying 1/5 length of median lobe aedeagus ( Fig. 23A ); apex triangular ( Fig. 23B ); tegmen Y shaped, slender, basal piece of tegmen triangular, lateral lobes strongly scleritized, combined with second connecting membrane; internal sac membranous, with dorsal, median, and ventral sclerites moderately scleritized, distal part of dorsal sclerite squarely shaped ( Figs 23C–D ). Figures 25–29. Female reproductive organs of Lilioceris spp. 25. L. fouana , China (Sichuan: Luding). 26. L. vietnamica , China (Yunnan: Jinghong). 27. L. cantonensis , China (Zhejiang: Tianmu Shan). 28. Lilioceris neptis , China (Guangxi: Guilin). 29. L. subpolita , Japan (Mont Takao). A. Dorsal view. B. Ventral view. C. Spermatheca. Scale bars: A–B =0.5 mm; C = 0.1 mm. Female reproductive organs ( Figs 29A–C ). Tergites 8 and 9, sternites 8 and 9 of female sclerotized, posterior areas of tergite 8 and sternite 8 with dense setae, without apodemes, spiculum gastrale long, Y shaped, strongly widened in distal part, apical margin rounded; vaginal palpi with dense setae, cylindrical and long; spermatheca complicatedly folded. Distribution ( Fig. 30 ). Russia (Siberia), Japan ( Heinze, 1943 ; Medvedev, 1958 ; Kimoto, 1961 ; Naito, 2012 ). Host plant and habitat. Smilax china L. and S. riparia A. DC in Japan ( Naito, 2012 ). Habitat unknown. Remarks. This species can be distinguished from L. neptis by the following features: pronotal disc nearly smooth, without rows of punctures; elytral punctures sparse in base. In L. neptis , the pronotal disc has two rows (rarely one row) of large punctures; elytral punctures are dense in base.