Tachycines (Gymnaeta) dianxicus Qin & Liu & Li 2019, sp. nov.

Tachcyines (Gymnaeta) dianxicus sp. nov.

(Figs. 78–80)

Description. Male. Body rather small for this genus. Vertex of head divided into conical tubercles (Fig. 78). Legs elongate and slender; fore femur about 2.1 times longer than the pronotum, ventrally unarmed, internal genicular lobe with a small spine, external genicular lobe with 1 elongate movable spur; fore tibiae ventrally with 2 external spurs and 2 internal spurs. Mid femur with an elongate movable spur on the internal and external genicular lobe, ventrally unarmed; mid tibiae beneath with 1 external and 1 internal spur. Hind femur without spines ventrally; hind tibiae above at each side with 41–49 spines respectively, arranged in groups. Supra internal spur of hind tibiae not exceeding ventral apex of hind metatarsus. Hind metatarsus keeled ventrally (Fig. 79). Male genitalia as Fig. 80.

Female. Unknown.

Coloration. Body light brown. Pronotum and abdominal tergite with distinct stripes. Fore and mid legs with light stripes, hind femur with dark brown stripes.

Measurements. (length in mm) Body ♂ 8.5–10.0; pronotum ♂ 4.5–5.0; fore femur ♂ 9.5–11.0; hind femur ♂ 18.0.

Specimens studied. Holotype, 1♂, Qiqi, Gongshanxian, Yunnan, alt. 2300m, 2010-VI-28 ~ VII-3, collected by Bi Wen-Xuan; paratypes, 2♂♂, same data as holotype.

Distribution. China (Yunnan).

Diagnosis. This species is rather similar to T. (G.) pallidus sp. nov., but differs from the latter by both lateral margins of the male epiphallus running not parallel; corresponding status of T. (G.) pallidus sp. nov.: both lateral margins of the male epiphallus running almost parallel.

Etymology. The specific epithet refers to the locality where specimens were collected, dianxi means western region of Yunnan province of China.