Idioscopus bihamulus sp. nov.

Figs 1, 3 A-D

Type material.

Holotype: ♂, Baoshan City, Mt Gaoligongshan, Yunnan Province, China (98°47'42"E, 25°18'20"N; 1745 m elev.), 4 August 2018, coll. Zhou Yu (GUGC). Paratypes: 1♂, 6♀♀, same data as holotype.

Diagnosis.

The new species can be distinguished from other Idioscopus species by the combination of the following features: anal tube short; style apophysis with a row of three or four subapical teeth along inner margin; aedeagal shaft with long, recurved, hook-like apical processes.

Description.

Coloration. Ground coloration translucent brown. Vertex pale brown with two round spots close to the adjacent eyes (Fig. 1A). Eyes and ocelli brown (Fig. 1A-C). Face (Fig. 1B, C) yellowish white, narrow area along inner margin of eye, area surrounding bases of antennae, and inner margins of gena along frontal suture black, upper area with dark brown semicircular marking. Pronotum (Fig. 1A) yellowish brown along anterior margin, posterior two-thirds brown, with a brown U-shaped band medially. Mesosternum (Fig. 1A) black, mesepimeron with black spot. Mesonotum (Fig. 1A) yellow with pair of triangular, laterobasal, black maculae. Forewing with veins brown (Fig. 1A).

External features as in generic description with face and pronotum shagreen and crown finely transversely rugose. Male antennae without apical disc. Forewing (Fig. 1D) with two subapical cells; inner subapical open.

Male genitalia. Male pygofer (Fig. 1E, F) without ventral process; anal collar thin with apex upturned; anterodorsal apodemes well developed. Anal tube (Fig. 1E) short. Subgenital plates (Fig. 1E) of uniform width, with reduced hair-like marginal setae. Connective (Fig. 1G) T-shaped, with stem narrow. Style apophysis (Fig. 1G) with a row of three or four tooth-like projections along inner margin subapically, outer margin with macrosetae in distal one-third. Aedeagus (Fig. 1H, I) with shaft laterally compressed, with pair of long, recurved, hook-like processes subapically from ventral margin, acute apically; basal apodeme pillar-like in lateral view, distally and laterally expanded in ventral view.

Female genitalia. Posterior margin of sternite VII (Fig. 3A) slightly produced medially. Valvulae as in Figure 3B-E.

Measurements (mm).

Male: body length including tegmina 3.70-3.80. Medial length of crown 0.13-0.16, width 1.25-1.30. Distance from ocellus to eyes 0.15-0.20. Medial length of pronotum 0.40-0.45, width 1.10-1.20; scutellum length 0.50-0.55, width 0.95-1.05. Female: body length including tegmina 3.70-3.90.

Etymology.

The specific epithet refers to the two hamulus-like (hook-like) aedeagal processes.

Host plant.

Unknown.

Distribution.

China (Yunnan).