Drabescus hainanensis Lu & Webb & Zhang 2019, sp. nov.

Drabescus hainanensis sp. nov.

Fig. 2.

Head slightly broader than pronotum, broadly rounded in lateral view with a faint carina between antennal ledges. Vertex relatively narrow, short with anterior and posterior margins subparallel, slightly angularly rounded near eye, elevated posteriorly, coronal suture vestigial, shiny with few longitudinal striations between ocelli. Ocelli marginal, 4 times own diameter from eyes. Clypeus narrow, rugose medially. Pronotum depressed near lateral foremargin, transversely striate. Forewing with first apical cell largest, fourth smallest. Fore tibia dorsally flattened and expanded.

Male pygofer long, lobes without dorsal macrosetae; posteroventral margin extended dorsally into a long robust processes. Valve broadly triangular. Subgenital plate short, triangle without digitate apex; without macrosetae, with some short fine lateral and apical setae. Style with apical process moderately long, preapical lobe well developed, tapered to acutely rounded apex. Connective Y-shape, with stem shorter than arms. Aedeagus simple, shaft narrow, slightly upturned distally and slightly laterally compressed basally, without processes, gonopore apical; with moderately long preatrium, slightly expanded distally in ventral view to articulation with connective; dorsal apodeme absent.

Material examined. Holotype: male, China, Hainan Prov., Jianfengling Mountains, 980m, 7.v.2008, Coll. Men Qiulei (NWAFU). Paratype: male, Hainan Prov., Kitung-shan District, Mount Rangel, Tai-pin-ts’uen, Lamkaheung, Lai-mo-ling, F.K. To, 25–26.iv.1935 (BMNH).

Etymology. The species takes its name from the type locality, Hainan Island.

Remarks. The new species is similar in external appearance to Drabescus nitens (Stål) (see below) and several new species from Malaysia and Indonesia in the BMNH. All these species differ from typical Drabescus in having the fore margin of the head broadly rounded in profile (compare Figs 2B and 3B with Fig. 1B) with the vertex relatively narrow and with the foremargin slightly angular near to each eye (Fig. 2C, 3C). The new species and those from Malaysia and Indonesia also differ in having the foretibia distinctly flattened and expanded and the subgenital plates short (compare Fig. 2I with Figs 1H and 3J).