Cordax serratus Sun, Li & Liu, 2016, sp. nov.

Cordax serratus sp. nov.

(Figs. 24‒29)

Description. Male size medium, body slender. Head smooth, swollen. Eyes prominent, nearly as long as genae in length, sutures indistinct. Antennae long and slender, 11 joints, first joint decidedly longer than the distance between the antennal bases, above flat, with distinct lateral ridges; third and fourth joints almost equal, but shorter than fifth. Pronotum smooth, almost as broad as long, anterior and hind margins rounded, lateral margins parallel, prozona slightly tumid, median sulcus distinct, with paired depressions on both sides, metazona flat. Elytra and wings completely developed. Elytra smooth, about twice as long as pronotum, external margins without ridge, anterior margins truncate. Scales of wings slightly shorter than pronotum. Legs short, anterior femora thick, hind tarsus with first joint almost equal to third joint, second joint strongly enlarged. Abdomen smooth, with very indistinct, sparse punctations, stink-glands feeble but distinct, seventh to ninth segments each with a weak tubercle, last dorsal segment transverse and parallel, half as broad as long, above with paired of slightly raised tubercles over the roots of the forceps (Fig. 24). Subgenital plate transverse, with broadly rounded posterior margin and some punctations (Fig. 25). Pygidium not tranverse, with short stumpy tubercles. Forceps widely separated at base, narrowed to the apex and incurved, internal margins serrated in basal half (Fig. 26).Genitalia (Figs. 27) with parameres as type, basal vesitcle with two narrow sclerotized plates and one of them armed with denticulations, virga small.

Female similar to male, but subgenital plate broader (Fig. 28), forceps slender, simple, nearly touching at base, incurved at the apex, internal margins crenulate (Fig. 29).

Coloration. Generally pale yellowish brown, nearly unicolorous.

Measurements. Total body: ♂ 15.0, ♀ 15.0; forceps: ♂ 4.0, ♀ 6.0.

Material. Holotype ♂, Longhushan, Longan, Guangxi, China, 1995. VIII.1, collected by Liu Xian-Wei et al.; paratype 1♀, Fengyang Mountain, Longquan, Zhejiang, China, elev. 1100‒1500m, 2008. VII.30‒VIII.4, collected by Liu Xian-Wei & Bi Wen-Xuan.

Distribution. China (Guangxi, Zhejiang).

Discussion. This new species is very similar to C. inermis (Borelli, 1915), but differs in that the forceps of the male are shorter and strongly curved, and the internal margins are serrated in the basal one-third.