Nyctimenius chiangi Huang, Chen & Liu, sp. nov.

(Figs 1–8)

Description. Male: body length 9.0 mm, width at humeri 2.0 mm. Body pitchy brown. Palpomeres and clypeus yellowish brown, mandible reddish brown and darker towards apex, labrum reddish brown (Fig. 6); head, antennomeres I–VII and XI, and pronotum dark brown (Figs 1–4); antennomeres VIII (except for base) and X pale yellow (Figs 1, 3, 8); elytral base yellowish brown, elytron with a yellowish brown longitudinal vitta starting from middle of base, reaching the apical fifth (Figs 1–2); prosternal process, apex of the mesosternal process, femora, base of tibiae, tarsomere V and claws yellowish brown (Figs 1–5).

Body densely covered with short grayish white hairs, vertex moderately with dense short brown hairs, antennomeres I–VII, XI and base of VIII with short brown hairs, base of the segments III–VII with short white hairs, antennomeres VIII (except for base) and X with short white hairs (Figs 1, 3, 8), segments I–VII sparsely with long dark-brown cilia beneath, apex of segments VIII–X with several short brown hairs beneath (Fig. 8). Pronotum moderately covered with short dense brown short hairs and with three grayish white longitudinal vittae, one narrower in middle, and the other two broader at sides of dorsal surface (Figs 1–2). Elytra moderately covered with short dense brown short hairs, elytron with four grayish white longitudinal vittae, the first one starting from scutellum posterior and reaching the apex along suture, the second one from the middle of base covering the yellowish brown vitta, not reaching the elytral apex, the third one from the humeri posterior nearly reaching apex (Figs 1–2), the forth one indistinctive, from side of the humeri not reaching the middle (Fig. 5). Abdominal segments II–IV sparsely covered with long dark brown semi-erect hairs at apex, the segment V sparsely with long black hairs at apex (Figs 3–4).

Head about as broad as pronotum, frons with a narrow and mesial line extending from the base of clypeus up to the apical margin of the pronotum (Fig. 6); mandibles bifurcate apically, with an external depression at apex and base (Fig. 7); frons sparsely punctured (Fig. 6); vertex moderately covered with dense punctures (Figs 1–2); lower eye lobe about as long as gena (Fig. 5); antennae 2.1 times as long as body, 11-jointed, pedicel sub-cylindrical, relative length of each antennomere as follows: 7.5: 0.7: 7.8: 8.4: 9.0: 8.5: 8.1: 7.2: 6.3: 5.7: 4.1. Pronotum moderately covered with dense punctures. Elytra 3.2 times as long as wide at base; disc moderately covered with dense punctures at the basal 3/4, the punctures coarser near suture, sparser and finer posteriorly. Apex of the ventrite V with a small notch in middle.

Diagnosis. According to the original descriptions of all described species, this new species is similar to N. varicornis in body color, however, it can be distinguished from N. varicornis in the antennomere VIII pale yellow (except for the base), femora and base of tibiae yellowish brown, vertex, pronotum and elytra covered with denser and coarser punctures, and elytra without reticulate texture (seeing from venter).

Etymology. Named after the late Prof. Shu-nan Chiang (1914–2013) for his contributions to the studies of the longicorn beetles from China.

Specimens examined. Holotype: male (SWUC-Co- 01-03-00 -00-00-691), China: Longmen village, Mengla county, Yunnan province, alt. 1027 m, 9. V. 2009, Xingmin Wang leg.

Distribution. China (Yunnan).