Drabescus, Stal, 1870

Viraktamath, C. A., Webb, M. D. & Yeshwanth, H. M., 2022, Review of the leafhopper genus Drabescus Stål (Hemiptera: Cicadellidae: Deltocephalinae) in the Indian subcontinent with description of one new species, Zootaxa 5128 (2), pp. 225-247 : 228

Key to species of Drabescus from the Indian subcontinent (females)

[Female of D. austroindicus not known.]

1. Pronotum with anterior pale border anteriorly margined by dark brown and along lateral submargin margined laterally with dark brown (Figs 1K, 2E, 4A)........................................................................... 2

- Pronotum without such pale border (Figs 1AC, E)........................................................... 4

2. Dorsum of abdomen stramineous (visible through the forewings) ( Figs 4 AB)...................... D. stramineus Distant

- Dorsum of abdomen dark brown or reddish brown........................................................... 3

3. Posterior margin of sternite VII with long median lobe length equalling or exceeding length of rest of the sternite ( Fig. 2L )..................................................................................... D. shillongensis Rao

- Posterior margin of sternite VII with a median incision ( Fig. 2I )................................. D. limbaticeps (Stål)

4. Posterior margin of sternite VII with deep V-shaped incision ( Fig. 2K )........................ D. nigrofacialis (Distant)

- Posterior margin of sternite VII without median incision ( Figs 2 HJ)............................................. 5

5. Sternite VII with median U-shaped excavation ( Fig. 2G )..................................... D. angulatus Signoret

- Sternite VII with median convexity or with a median lobe......................................................6

6. Yellowish white with dark brown rich maculation on head and thorax; posterior margin of sternite VII sinuate ( Fig. 2J )................................................................................. D. nervosopunctatus Signoret

- Reddish brown marked with yellowish white; posterior margin of sternite VII with small median lobe ( Fig. 2H ).................................................................................................. D. kempi Pruthi

Figures

FIGURES 2 A–L. Species of Drabescus from Indian subcontinent. Habitus, dorsal and lateral views (A–F) and female sternite VII (G–L). A–B, D. nervosopunctatus Signoret; C–D, D. nigrofacialis (Distant); E–F, D. shillongensis Rao; G, D. angulatus Signoret; H, D. kempi Pruthi; I, D. limbaticeps Signoret; J, D. nervosopunctatus Signoret; K, D. nigrofacialis (Distant); L, D. shillongensis Rao.

FIGURES 4 A–G. Species of Drabescus from Indian subcontinent. D. stramineus Distant, lectotype female: A, dorsal view; B, lateral view; C, face and thoracic sternites, ventral view; D, abdomen ventral view; E, data labels; F. Drabescus sp., nymph; G. D. limbaticephs (Stål), adult in natural habitat.