Matsumura, 1927 : 55 Cicadetta sachalinensis Matsumura, 1917 Kato, 1928 : 185 Melampsalta radiator Uhler, 1896 Matsumura, 1931 : 1233 Cicadetta sachalinensis Matsumura, 1917 Cicadettini K. mogannia K. chinensis K. yezoensis A review of the cicada genus Kosemia Matsumura (Hemiptera: Cicadidae) Qi, Shengping Hayashi, Masami Wei, Cong Zootaxa 2015 3911 4 451 492 8HL86 Matsumura, 1927 Matsumura 1927 [238,571,1822,1848] Insecta Cicadidae Kosemia Animalia Hemiptera 1 452 Arthropoda genus     Kosemia  Matsumura, 1927: 55. Typespecies:  Cicadetta sachalinensis Matsumura, 1917[ Typelocality: Russia(“Saghalien (Odomari, Toyohara)”)], by original designation.    Leptopsalta  Kato, 1928: 185. Typespecies:  Melampsalta radiator Uhler, 1896[ Typelocality: Japan], by original designation. Karapsalta  Matsumura, 1931: 1233. [nomen nudum] Typespecies:  Cicadetta sachalinensis Matsumura, 1917[ Typelocality: Russia(“Saghalien (Odomari, Toyohara)”)], by monotypy. Small to medium sized species for Cicadettini(body length male: 14.0–27.0 mm; female: 18.0–27.0 mm). Head ( Fig. 14C) including eyes nearly as wide as base of mesonotum. Distance between lateral ocellus and nearest eye about as long as distance between lateral ocelli. Postclypeus ( Fig. 14D) a little prominent anteriorly and shape in transverse cross-section rounded, with central longitudinal sulcus and lateral transverse grooves. Rostrum ( Fig. 14D) reaching beyond middle coxae. Lateral part of pronotal collar ( Fig. 14C) ampliate, lateral angle of pronotal collar well ampliate posterolaterally. Wings ( Figs. 14A–B) hyaline (except for  K. mogannia  comb. n.whose wings with basal half infuscated); fore wing with eight apical cells; hind wing with six apical cells; veins M and CuA of fore wing contiguous at basal cell but not fused (except for males of  K. chinensis  comb. n.and both sexes of  K. yezoensiswhose veins M and CuA of fore wing fused at basal cell); hind wing with veins RPand M fused at base. Male operculum ( Fig. 14E) slightly oblique; distomedial margin oval or obtusely angulated, approaching to the other one but not meeting it medially; posterior margin not extending to abdominal sternite II. Female operculum ( Fig. 15B) very small, rounded posteriorly. Meracanthus ( Fig. 13E) small, triangular, slightly curved laterally, pointing posteriorly. Male abdomen ( Fig. 14A) cylindrical, not keeled mid-dorsally; sternite VIII ( Fig. 14E) about as long as or shorter than sternite VII. Female abdomen ( Figs. 16A–B) conical, gradually narrowed caudally; posterior margin of sternite VII ( Fig. 16D) with median incision very deep and broad, to about 4/5 the length of sternite VII. Timbal covers absent; timbals usually with two or three long ribs, lacking prominent intermediate short ribs, basal dome large. Male pygofer ( Figs. 15A, B, D, E) in ventral view ovoid to sub-ovoid in shape, dorsal beak with apex pointed; upper lobe well developed, triangular in lateral view, with apex obtuse; basal lobe moderately developed, tending to be broadly angled in lateral view, somewhat tucked submarginally. Median lobe of uncus ( Figs. 15A, B, D, E) somewhat duck-bill shaped; apex slightly upswept; paramedian area slightly convex in ventral view, weakly developed but much smaller than anal styles. Clasper ( Figs. 15A, B, D, E; 18A, B, D, E) moderately elongated, digitate, meeting the other one at base then separated, apex obtuse. Aedeagus ( Figs. 15C, F; 18C, F) arched, ventral support present; thecal pseudoparameres on dorsal side of theca originated near thecal base, protruding beyond endotheca; ejaculatory duct tubular, slender, with apical portion terminated in endotheca; basal plate of aedeagus broadened anteriorly in dorsal/ventral view. Dorsal beak of female pygofer ( Figs. 16C, D; 19C, D) short, sharply pointed apically in lateral view, protruding beyond anal styles; ovipositor sheath extending beyond dorsal beak of pygofer.   Distribution. China(Inner Mongolia, Heilongjiang, Liaoning, Hebei, Shanxi, Henan, Shaanxi, Gansu, Qinghai, Ningxia, Xinjiang, Hubei, Zhejiang, Sichuan, Fujian, Yunnan, Tibet, Hong Kong), Russia, Mongolia, Korea, Japan.   Remarks.This genus is similar to  CicadettaKolenati, but can be distinguished from the latter by the following characteristics: lateral part of pronotal collar ampliate (lateral part of pronotal collar not developed or dilated.in  Cicadetta); median lobe of uncus weakly developed and much smaller than anal styles (median lobe of uncus developed, lobe-like, much longer than anal styles in  Cicadetta); clasper elongate anterolaterally, digitate, apex obtuse (clasper stout, apex somewhat acute in  Cicadetta); aedeagus with pseudoparameres short and acute, slightly protruding beyond the endotheca (aedeagus with pseudoparameres exceedingly long, surpassing the distal end of theca by about half its length in  Cicadetta).