Key to species (males) of Drabescus from China Note. The following species are not included in the key: D. albostriatus, D. extensus and D. fuscorufous (only known from the female) and type specimens of D. atratus and D. notatus (unknown sex). 1 Head strongly triangularly produced, median length approximately three times as long as next to eyes; crown and frontoclypeus with the median bulging longitudinal ridges.............................................. D. mucronatus sp. nov. - Head rounded or angularly produced, median length nearly as long as next to eyes or less than twice as long as next to eyes; crown and frontoclypeus regions without ridge.............................................................. 2 2 Anterior margin of head conspicuously produced angularly in lateral view; aedeagus with dorsoatrium present or absent, preatrium present or absent............................................................................. 3 - Anterior margin of head broadly rounded in lateral view; aedeagus without dorsoatrium, preatrium present... D. hainanensis 3 Aedeagal shaft without process in ventral view.............................................................. 4 - Aedeagal shaft with process in ventral view................................................................ 7 4 Style without subapical tooth-like process.................................................................. 5 - Style with small subapical tooth-like processes................................................. D. multipunctatus 5 Ventral margin of pygofer side without serrate process subapically.............................................. 6 - Ventral margin of pygofer side with serrate processes subapically..................................... D. cuspidatus 6 Aedeagal shaft dorsolaterad expanded subapically in lateral view..................................... D. henanensis - Aedeagal shaft not expanded subapically in lateral view.............................................. D. ineffectus 7 Dorsal margin of aedeagal shaft without tooth in lateral view................................................... 8 - Dorsal margin of aedeagal shaft with middle fine teeth in lateral view................................. D. bilaminatus 8 Aedeagal shaft with a pair of processes.................................................................... 9 - Aedeagal shaft with two pairs of processes................................................... D. quadrispinosus 9 Aedeagal shaft with process bifurcate apically............................................................. 10 - Aedeagal shaft with process not bifurcate apically.......................................................... 14 10 Bifurcate branch of aedeagus without small process......................................................... 11 - Bifurcate branch of aedeagus with small process................................................... D. jinxiuensis 11 Aedeagal shaft subapically expanded in lateral view......................................................... 12 - Aedeagal shaft not expanded subapically in lateral view...................................................... 13 12 Valve triangular; subgenital plates with inner margin constricted........................................ D. furcatus - Valve arciform; subgenital plates with inner margin relatively straight.................................. D. lamellatus 13 Aedeagal shaft relatively short, tapered to acute apex.................................................. D. gracilis - Aedeagal shaft relatively long and cylindrical, apex rounded................................................ D. lii 14 Aedeagal shaft with process shorter than or subequal to length of shaft.......................................... 15 - Aedeagal shaft with process longer than length of shaft............................................ D. formosanus 15 Crown, pronotum and scutellum totally bright yellow................................................. D. pallidus - Crown, pronotum and scutellum not as above.............................................................. 16 16 Head and thorax with yellowish medial longitudinal band.................................................... 17 - Head and thorax not as above........................................................................... 20 17 Connective with stem more than twice the length of arms.................................................... 18 - Connective with stem less than twice the length of arms...................................................... 19 18 Aedeagus without dorsoatrium................................................................. D. albosignus - Aedeagus with dorsoatrium developed............................................................ D. piceatus 19 Dorsal margin of aedeagal process with irregular dentate processes in lateral view...................... D. multidentatus - Dorsal margin of aedeagal process not as above..................................................... D. ogumae 20 Style without subapical tooth-like process................................................................. 21 - Style with subapical tooth-like processes......................................................... D. convolutus 21 Aedeagal shaft distally expanded in lateral view............................................................ 22 - Aedeagal shaft distally not expanded in lateral view......................................................... 25 22 Style with lateral lobe prominent........................................................................ 23 - Style without lateral lobe...................................................................... D. minipenis 23 Aedeagal shaft with process extending nearly to apex of shaft in lateral view..................................... 24 - Aedeagal shaft with process extending nearly to half of shaft in lateral view........................... D. shillongensis 24 Connective Y-shaped, stem longer than arms.............................................. D. macrocladus sp. nov. - Connective U-shaped, stem shorter than arms..................................................... D. pellucidus 25 Aedeagal shaft relatively straight in lateral view............................................................ 26 - Aedeagal shaft curved dorsad in lateral view............................................................... 28 26 Style with apical process wide, rather thick and relatively short................................................ 27 - Style with apical process narrow and very long.................................................. D. albofasciatus 27 Anteclypeus and frontoclypeus black................................................................ D. piceus - Anteclypeus and frontoclypeus yellowish brown.................................................... D. testaceus 28 Aedeagal shaft with process extending nearly to apex of shaft................................................. 29 - Aedeagal shaft with process extending nearly to mid-length of shaft............................................ 30 29 Style with lateral lobe prominent; connective U-shaped........................................ D. nervosopunctatus - Style without lateral lobe; connective Y-shaped...................................................... D. vilbastei 30 Connective with stem slender, longer than arms.................................................. D. limbaticeps - Connective with stem robust, nearly as long as arms................................................... D. nitobei

Published as part of Xu, Deliang & Zhang, Yalin, 2023, Taxonomy of the leafhopper genus Drabescus Stål (Hemiptera: Cicadellidae Deltocephalinae) with description of two new species from China, pp. 393-404 in Zootaxa 5264 (3) on pages 396-397, DOI: 10.11646/zootaxa.5264.3.7, http://zenodo.org/record/7836835