Drabescus macrocladus Xu & Zhang 2023, sp. nov.

1. Drabescus macrocladus sp. nov.

(Figs. 1, 2)

Description. Body length (including tegmina), male: 8.5–9.5 mm, female: 8.5–9.0 mm.

Body color tawny. Crown (Fig. 1, A, B, E) with fore margin black, anterior margin of head (Fig. 1, E) with a pale yellow transverse band, upper and lower margin black. Face (Fig 1. C) dark brown with broad yellowish transverse band in middle below eyes; antennal pedicel dark brown. Pronotum and scutellum (Fig. 1, A, B) with dense brown mottling. Forewing (Fig. 1, A, D) with veins yellowish brown, subcosta with periphery black-brown, with triangular whitish transverse band in the middle section. Leg (Fig. 1, C, D, E) yellow to brown.

Head (Fig. 1, A, B, E) broader than pronotum. Crown (Fig. 1, A, B) with anterior margin rounded and produced, median length of vertex slightly longer than next to eyes, transversely concave medially and subapically, coronal suture distinct, extended near 1/3 length of vertex. Face (Fig. 1, C) with anteclypeus conspicuously expanded apically; transclypeal suture obscure; lorum broad; gena with oblique wrinkles; lateral frontal sutures extending to corresponding ocelli. Pronotum (Fig. 1, A, B, E) with dense fine punctations, lateral margin long, carinate, hind margin strikingly concave.

Forewing (Fig. 1, A, D) crimped. Fore femur with anteromedial (AM1) row seta enlarged and stout, intercalary (IC) row with numerous scattered long setae. Metafemur with apical setal formula 2+2+1.

Male pygofer side (Fig. 2, I) constricted apically, apex broadly triangular, with numerous long macrosetae near caudal margin, ventroposterior margin without appendages. Valve (Fig. 2, J) oval. Subgenital plates (Fig. 2, J) with apical process long, digitate, tapering distally and strongly curved dorsad, with several fine hair-like microsetae arising from lateral margin. Style (Fig. 2, K) with apical process longish, wide and rather thick, lateral lobe prominently protruding with short microsetae, apex sclerotized. Connective (Fig. 2, L, M, N) Y-shaped, ventral margin angled at mid-length in lateral view; stem robust and longer than arms, articulated with aedeagus. Aedeagal shaft (Fig. 2, L) curved dorsad, apex expanded in lateral view, lamellate; shaft (Fig. 2, M, N) with a pair of long laterobasal processes, process apically tapering and extending nearly to apex of shaft; gonopore (Fig. 2, L, M, N) large, apical on ventroposterior surface. Anal tube (Fig. 2, I) large, strongly sclerotized laterally and dorsally.

Female: Seventh sternite (Fig. 1, H) black, hind margin concave; ovipositor (Fig. 1, H) exceeding apex of pygofer; dorsal margin of the first valvulae (Fig. 2, O, P) slightly produced near the middle, sculpturing pattern strigate; dorsal margin of the second valvulae (Fig. 2, Q, R) with a near median blunt tooth, with serrate teeth restricted to approximately apical one-fourth.

Material examined. Holotype: ♁, Hainan Province, Jianfengling Mountains, 900 m, 7-V-2008, Coll. Men Qiulei (NWAFU). Paratypes: 1♁ 1♀, same data as the holotype except 980 m, 5-V-2008; 1♀, same data as the holotype except 950 m, 9-V-2008.

Etymology. The specific epithet of this new species originates from the Latin word “ macro ” and Greek “ klados ”, referring to the aedeagal shaft having a pair of long ramiform laterobasal processes.

Remarks. This new species is similar to D. vilbastei Zhang & Webb, 1996, but it can be distinguished from the latter by the following characters: face with broad yellowish transverse band in middle below eyes (without transverse band, frontoclypeus black brown in D. vilbastei); male pygofer side with ventroposterior margin without process (with a pair of processes in D. vilbastei); style with lateral lobe prominently protruding (absent in D. vilbastei); aedeagal shaft with apex expanded in lateral view (not expanded in lateral view in D. vilbastei).