Tamdaotettix (Tamdaotettix) tridenticulatus sp. nov.

(Figs. 5–7)

Description. Male. Body intermediate sized, shining. Head with fastigium of vertex divided into two conical tubercles, completely fused. Legs long and slender; fore femora about 1.4 times as long as the pronotum, beneath unarmed, external genicular lobe with a long movable spur; fore tibiae beneath with 1–2 external and 2 internal spur(s), between the paired apical spurs with a short spur. Mid femora with a long movable spur on the external and internal genicular lobe; mid tibiae beneath with 2 external and 1 internal spur(s), between the paired apical spurs with a short spur. Hind femora beneath with 6 inter spines and without outer spines; hind tibiae above with 40–43 outer spines and 40–41 inter spines, arrange in clusters, inner subapical spur of hind tibiae slightly longer than hind metatarsus. Hind metatarsus with 3–6 dorsal spines. Process of 7th abdominal tergite with 3 denticles, middle denticle distinctly longer than lateral denticles. Process of 6th abdominal tergite with a spine-like projection (Fig. 5). Paraproct rather short and compressed in profile (Fig. 6).

Female. Subgenital plate nearly semicircular and apex blunt (Fig. 7). Ovipositor shorter than the half of hind femora.

Coloration. Body dark black. Some individuals with a greyish white band on the tergite. Fore and mid leg darkish. Hind leg yellowish brown and hind femora with dark stripes.

Measurements. (length in mm) Body Ƌ11.0–12.0, ♀ 10.0–12.0; pronotum Ƌ5.5–6.0, ♀ 5.0–6.0; fore femora Ƌ8.0, ♀ 7.0–9.5; hind femora Ƌ17.0–17.5, ♀ 16.5–19.5; hind tibiae Ƌ17.5–19.0, ♀ 16.0–20.5; ovipositor 6.0–6.5.

Material examined. Holotype, 1♂, Jiuwan Mountain, Guangxi, alt. 1200m, 2015. VII.19, collected by Liu Xian-Wei et al.; paratype, 2♀♀, same data as holotype; 1Ƌ 1♀, Daming Mountain, Guangxi, China, alt. 1250m, 2013. VII.19–25, collected by Liu Xian-Wei et al.; 1♀, Leigong Mountain, Guizhou, China, alt. 690–800m, 2015. VIII.1–2, collected by Sun Mei-Ling; 1Ƌ, Leigong Mountain, Guizhou, China, alt. 1530–2160m, 2015. VII.28–30, collected by Qin Yan-Yan.

Distribution. China (Guangxi, Guizhou).

Discussion. This species is very similar to Tamdaotettix (Tamdaotettix) aculeatus Gorochov, 2015, but differs from the latter in: process of 7th abdominal tergite with 3 denticles, middle denticle distinctly longer than lateral denticles and process of paraproct compressed in profile.