Drabescus quadrispinosus, Shang, Suqin, Webb, M. D. & Zhang, Yalin, 2014

Shang, Suqin, Webb, M. D. & Zhang, Yalin, 2014, Key to Chinese species of the leafhopper genus Drabescus (Hemiptera: Cicadellidae: Deltocephalinae) with description of a new species, Zootaxa 3852 (1), pp. 141-146 : 143

1. Drabescus quadrispinosus sp. nov.

( Fig. 1 )

Body length (incl. tegmen): ♂, 6.7–8.8mm; ♀, 8.8 mm

Head and thorax stramineous dorsally. Vertex with yellow band anteriorly margined dark brown. Face yellow with clypeus, clypellus, antennal pit and basal segment of antenna, dark brown. Pronotum with narrow yellow band anteriorly, lateral margin brown. Forewing pale brownish hyaline, veins brown with white maculation. Female pregenital segment with posterior medial lobe dark brown.

Head ( Fig. 1 A) slightly wider than pronotum; fore-margin with few fine transverse striations. Vertex with midlength slightly longer than length next to eyes. Face ( Fig. 1 B) with antennal ledge strong; transverse ridge present between antennal ledges; laterofrontal suture extended to lateral margin of corresponding ocellus; clypeus with longitudinal striations. Pronotum ( Fig. 1 A) with lateral margin short; transversely striate. Fore tibia flattened dorsally. Hind femur with apical setae 2+1.

Male pygofer ( Fig. 1 D) tapered to narrow apex posteriorly, with moderately long process ventroposteriorly. Subgenital plate ( Fig. 1 E) elongate, triangular with several short fine setae basolaterally. Style ( Fig. 1 F) with apical process digitate, moderately long; lateral lobe very short. Connective ( Figs. 1 F, 1G) short. Aedeagus ( Figs 1 F, 1G) with shaft curved ventrally, with pair of long processes basally on each side, inner process of each pair narrower.

Female pregenital sternite ( Fig. 1 C) deeply incised each side of midline forming distinct medial lobe.

Material examined. Holotype ♂, CHINA, Szechwan Province, Chengtu, 1700ft, 1–20.vi.1933, D.C. Graham ( NMNH). Paratypes, China: Szechwan Province: 1♀, same data as holotype ( NMNH); 1♀, same data as holotype except 1–3.vii.1933 ( NMNH); 1♂, Shin Kai Si, near Kiating, Mt. Omei, 4400ft, 1921, D.C. Graham ( BMNH); 1♀, Beh Luh Din, 80m, 6000ft, vii–viii.1933, D.C. Graham ( BMNH); Gansu Province: 1♂, Zhongmiao, Biaokoi, Wen County, 700m, light trap, 24.vi.1998, coll. Yao-Jian (IOZ).

Etymology. This species is named for the four basal aedeagal processes.

Remarks: This species can be distinguished in the male genitalia by its elongate triangular subgenital plate and ventrally curved aedeagal shaft with four basal processes.

Figures

FIGURE 1. Drabescus quadrispinosus sp. nov. A. adult, dorsal view; B. face, ventral view; C. female terminalia, ventral view; D. left side of pygofer, lateral view; E. valve and subgenital plate, ventral view; F. aedeagus and connective, lateral view; G. aedeagus, connective and style, ventral view.