Dayus membranaceus, Qin & Zhang, 2007

Qin, Dao-Zheng & Zhang, Ya-Lin, 2007, Revision of the Chinese species of the leafhopper genus Dayus Mahmood (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini), with description of three new species, Zootaxa 1624 (1), pp. 43-51 : 45-48

Dayus membranaceus n.sp.

( Figs. 13–21 )

Type material. Holotype, male ( NWAFU): Guilin, Shaowu , Fujian Province, 14 Jul. 1963, coll. Yao Zhou.

Length. Male 3.5 mm.

Ground colour of body red. Vertex with a beige irregular patch bordering eye. Eyes greyish-black. Scutellum medially with a small yellowish patch at anterior margin. Scutoscutellar sulcus dark red, below with a small yellowish patch. Apical part of forewing semitransparent, light testaceous. Abdominal sternites with a yellowish transverse fascia anteriorly and posteriorly reddish orange centrally; a small yellowish patch laterally on each of segments 3–8. Legs red except first and apical half of third tibia, sordid red and third tarsi sordid yellow.

Male pygofer elongate, apical half narrowing caudally in lateral view, with 6 rigid setae at apex of pygofer lobe with more posterior setae longer; lobe-like structure of dorsal margin with a rigid seta; ventral pygofer appendage long, subapex arched distally and slightly expanded, distally very slightly sinuate with pointed apex. Subgenital plate broadest at base, gradually tapering towards apex, with 6–7 macrosetae in basal group, 29–30 spine-like setae laterally, 11 uniseriate macrosetae, and several elongate fine setae starting caudad of, and simliar in length to, basal macrosetae. Parameres broad, sinuate, apex bearing more than 10 denticles, more compact apically and preceded by about 9 setae. Aedeagal shaft broader in basal half in dorsal view with a process arising medially at each side, far surpassing tip of shaft, apex of shaft membranous, expanded, surface with teeth. Anal tube process broad, tapering and curved apically.

Etymology. The specific name is derived from the Latin word membranaceus which refers to the membranous aedeagal apex in this species.

Female. Unknown.

Discussion. This species is similar to D. formosus and D. elongatus . It differs from these species by its arched and subapically slightly expanded ventral pygofer appendage; subgenital plate with 6–7 setae in basal group; aedeagal shaft broad in basal half, with a process arising medially at each side, far surpassing the tip of shaft; and tip of shaft membraneous, expanded, with surface denticles. It also differs from D. elongatus in lacking the apical lobe of the subgenital plate.

Figures

FIGURES 13–21. Dayus membranaceus n. sp., 13, head and thorax, dorsal view; 14, face; 15, pygofer, lateral view; 16, aedeagus and connective, lateral view; 17, same, dorsal view; 18, paramere; 19, subgenital plate; 20, anal tube process; 21, ventral pygofer appendage.