| The present dissertation is a systematic study on the Chinese lassine Cicadellid. It comprises mainly there parts: the taxonomic section and the fauna analysis and the cladistic analysis of lasinae and Batracomorphus.1 Classification58 species in total of the lassinae from China are described, which are grouped into 5 genera (laasus, Batracomorphus, Trocnadella ,Krisna, Parakrisnd) ; 10 species are new to the cicadellid fauna of China. Some species are revised; 5 new combinations are created. Each genus and most species is fully described; and an account of its distribution and, if possible, host plant and diagnostic remarks are included. Keys to the genera and species are made. Illustrations of critical characters of adults are given.The new taxa, new records to Chinese fauna and new combinations in this study are listed as follows: (1) lassusparalanio Jiang et Cai, sp. nov. (fig.7)This new species resembles I. lanio, but differs from the latter in the color of pronotum and the structure of male genitalia, especially the characters of thepygophore appendage.Length: ♂ 6.0mm, ♀6.1; Length incL Tegm.: ♂ 7.3mm,-? 7.3mm.Holotype♂ , Paratype ♀, East village, MudanJiang, Liaoning Prov., 1980. VI. 1, ZhengLeyi.(2) lassus brunneus (Matsumura,1912), new to ChinaMacropsis brunnea Matsumura,1912b. Stragania brunnea Ishihara,1953b. Bythoscopus brunnea Esaki & Ito,1954a Batracomorphus brunneus Nast, 1972. lassus brunneus Virakamath 1979a:93.Specimen examined: 1♀, Mt. Changbaishan, Jilin Prov., 1979. VII .22 ,, Fangqingquan.Distribution -. Jilin (Changbaishan Mt.)-, Japan.(3) lassus dorsalis (Matsumura,1912) new to ChinaMacropsis dorsalis Matsumura,1912b. Stragania dorsalis Ishihara,1952c. Bythoscopus dorsalis Esaki & Ito,1954a Batracomorphus dorsalis Nast, 1972. lassus dorsalis Virakamath 1979a:97.Specimen examined: 1 ♂ 8 ♀♀, Mt. Wangwushan, 680m, 2000.VI.4, Jiyuan, HenanProv., 1979.VID.22, Guxiaoling. Distribution: Henan(Jiyuan); Japan.( 4 ) lassus albidulus Jiang et Cai, sp. nov. ( fig.8 )This species is distinguished from other known species of the genus by the big pits of body and the white veins.Length: ♀ 5.8mm; Length incl. Tegm.: 6.6mm.Holotype♀ , Haitong, 3250m, Mangkang, Xizang, 1982.W1.2; paratype 1 ♀, Gezan, 3150m, Zhongdian, Yunnan Prov., 1981.VHI.6.( 5 ) lassus concavus Jiang et Cai, sp. nov. ( fig.9 ) This species may be easily separated from other known species of the genus by the ovalis concave on the anterior of the pronotum.Length: ♀-7.5-7.6mm ? Length incl. Tegm.: 8.0-8.6mm.Holotype ♀, Mt. Wangwu, Jiyuan, Henan prov., 2000.VIII. 1; paratypes3 ♀♀, the same as hoiotype.(6) Batracomorphus expansus (Li, 1993), com. nov.lassus expansus Li 1993:16Specimen examined: 1 ♂ , Guqiangyu, Tinjm,1986.V.31,(NKU) Distribution: Tinjin, Guizhou.(7) Batracomorphus paradentatus (Li, 1993), com. nov.lassus paradentatus Li 1993:17 Distribution: Guizhou.(8) Batracomorphus trunctus (Li, 1993:16), com. nov.lassus trunctus Li 1993:18 Distribution: Guizhou.(9) Batracomorphus subfuscus (Li, 1993), com. nov.lassus subfuscus Li 1993:19 Distribution: Tinjin.Guizhou.(10) Batracomorphus geminatus (Li, 1993), com. nov.lassus geminatus Li 1993:20Specimen examined: 2 ♂ 1 ♀, Shuiyang, Xuancheng, Anhui Prov., 1983. IV.28, (SAU);1& ,WeigangNanjing, JiangsuProv.,, 1984.VI.16, (NKU). Distribution, Anhui (Xuancheng), Jiangsu (Nanjing), Guizhou.(11) Batracomorphus curvihamosus Jiang et Cai, sp. nov. (fig.10)This species may be easily separated from other known species of the genus by the characters of aedeagus.Length: ♂ 4.4mm, ♀ 4.6mm.Holotype ♂ , Mt. Yu-an, Yunnan, 1974.VI.21; paratype ♀ , the same as hoiotype.IV(12 ) Batracomorphus dispiculatus Jiang et Cai, sp. nov. ( fig. 11)This species largely resembles B. fuscomaculatus (Kuoh), but differs by only two spins on subapcial aedeagus.Holotype ♂, Baoting, Hainan Prov., 1969.IX.? ; paratypes 2♀♀, Guling, Fuzh...
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