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 neptis species group Diagnosis. The species group is unique by: apex of mesoventral process more or less widened apically, tuberculate, and connected horizontally with metaventrite ( Figs 15B–19B ). Key to species of the Lilioceris neptis species-group in eastern Asia. 1. Smaller, body length less than 6.5 mm ; metaventral disc with a triangular setose patch near anterior margin ( Fig. 17C ); ventral side unicolored .............................................................................................................................................................................. L. fouana Larger , body length no less than 7.0 mm; metaventral disc with a setose patch near posterior margin ( Figs 15C, 16C ) or a long setose stripe ( Figs 18C, 19C ); ventral side bicolored...................................................................................................................................... 2 2. Antennomeres 5–10 slightly longer than wide ( Figs 13–14 ); head and antennae brownish red....................................... L. vietnamica Antennomeres 5–10 twice as long as wide; head and antennae black..................................................................................................3 3. Mesoventrite process strongly widened apically ( Figs 16B, 18B ); pronotal disc with at least one row of large punctures ................. 4 Mesoventrite process slightly widened apically ( Fig. 19B ); pronotal disc without row of large punctures .........................................5 4. Punctures of elytral striae dense at base, diminishing posteriorly, at most absent at extreme apex; outer metaventrite with a long stripe of setae, extending from anterior to posterior margin ( Fig. 18C )............................................................................................. L. neptis Punctures of elytral striae sparse at base, diminishing posteriorly, absent on apical 1/2 or 1/3; lateroposterior corner of metaventrite with a short oblique stripe of setae ( Fig. 16C ) ............................................................................................................... L. cantonensis 5. Punctures of elytral striae sparse at base, sparser and absent on apical 1/2( Figs 2 , 11 )....................................................... L. subpolita Punctures of elytral striae dense at base, neither sparser nor absent at apex ( Fig. 1 ) ................................................................. L. balyi