Drabescus Stål, 1870

Xu, Deliang & Zhang, Yalin, 2023, Taxonomy of the leafhopper genus Drabescus Stål (Hemiptera: Cicadellidae Deltocephalinae) with description of two new species from China, Zootaxa 5264 (3), pp. 393-404 : 394

Genus Drabescus Stål, 1870

Drabescus Stål, 1870: 738 ; Nast, 1972: 242; Zhang & Webb, 1996: 23; Zhang, Zhang & Chen, 1997: 238; Zhang & Shang,

2003: 96; Shang, Zhang & Shen, 2009: 49; Shang, Webb & Zhang, 2014: 141; Wang, Qu, Xing & Dai, 2016: 118; Xu &

Zhang, 2018: 473; Yu, Webb, Dai & Yang, 2019: 44; Lu, Webb & Zhang, 2019: 238; Viraktamath, Webb & Yeshwanth,

2022: 226. Type species: Bythoscopus remotus Walker, 1851 Tylissus Stål, 1870: 739 . Type species: Tylissus nitens Stål, 1870 Dabrescus Signoret, 1879: 52 ; Drabesens Chang, 1934: 118 ; Drabrescus Merino, 1936: 364 ; Debrescus Metcalf, 1966: 222 ;

Drabescens Metcalf, 1966: 222 (Misspelled) . Paradrabescus Kuoh, 1985: 379 . Type species: Paradrabescus testaceus Kuoh, 1985 Drabescus (Leucostigmidium) Anufriev & Emeljanov, 1988: 171 . Type species: Selenocephalus nigrifemoratus Matsumura, 1905 Drabescus (Ochrescus) Anufriev & Emeljanov, 1988: 172 . Type species: Drabescus ochrifrons Vilbaste, 1968

Diagnosis. Body robust, medium size to large leafhoppers with coloration black, brownish or yellowish; crown short and broad, discal portion glabrous, concave and flat, with radial or longitudinal striae; anterior margin of head rounded or moderately produced, with transverse ridge or band, ocelli situated on anterior margin of head, distant from eyes; face broad, frontoclypeus weakly swollen, texture glabrous or striate; anteclypeus narrow proximally and inflated distally; lora broad, subequal to or wider than anteclypeus near base; antennal pits deep, antennal bases at upper or anterodorsal corners of eyes, antennal ledges strong; anterior tentorial branches hooked with anterior arm not bifurcate; head broader than or subequal to pronotum; pronotum with transverse wrinkle and dense fine punctations, lateral margin long, carinate; scutellum triangular, transverse depression visible; forewing with four apical cells and three subapical cells, inner anteapical cell open, appendix large; fore femur with anteromedial (AM1) seta only, intercalary (IC) row in one row or scattered, anteroventral (AV) row with thin, hair-like setae or nearly without setae; protibia dorsal surface flattened and expanded apically or not; metafemur with apical setal formula 2+1, 2+1+1, 2+2+1 or 2+2+1+1.

Male genitalia: pygofer basolateral membranous cleft present; pygofer side with caudal margin rounded or produced posteriorly or without process, with several or numerous enlarged macrosetae or microsetae; valve semicircular or triangular; subgenital plates with apical length and shape variable, with fine hair-like setae arising from lateral margin; style with apical process long or short, lateral lobe prominent or absent; connective Y-shaped or U-shaped, stem equal to or longer than arms, fused or articulated with aedeagus; aedeagus with a pair of, or two pairs of, or without processes; dorsoatrium developed; gonopore subapical or apical on ventral surface.

Female genitalia: pygofer with numerous macrosetae; ovipositor extended posteriorly beyond pygofer apex or not; the first valvulae with sculpturing pattern strigate dorsally; the second valvulae with a dorsal median tooth or not, dorsal margin with serrate teeth restricted to apical 1/3 or more or 1/4 or less.

Distribution. Palaearctic, Afrotropical, Oriental or Australian regions.