Diestramima subtilis sp. nov.

(Figs. 14, 18)

Description. Male. Body medium-sized. Fastigium verticis divided into 2 conical tubercles, bases of tubercles drawn together, apices separated, obtuse, directing forward, slightly oblique downward (Fig. 14A, C). Eyes oval, protruding forward; median ocellus oval, located between antennal sockets; lateral ocelli nearly circular, situated on lateral margins of basal fastigium verticis (Fig. 14A–B). Apical segment of maxillary palp distinctly longer than subapical one, apex inflated, globular.

Anterior margin of pronotum rather straight, posterior margin protruding backward; lateral lobe longer than high, anterior margin straight, ventral margin arc-shaped (Fig. 14B–C). Posterior margin of mesonotum protruding backward, ventral margin of lateral lobe nearly semi-rounded. Posterior margin of metanotum slightly straight.

Fore coxae with 1 small spine; femora unarmed on ventral surface, external genicular lobe with 1 long spine; tibiae with 2 inner spines and 2 outer spines on ventral surface, apices with 1 outer spine on dorsal surface and 1 pair of spines on ventral surface, between the paired ventral spines with 1 small spine. Middle femora unarmed on ventral surface, internal and external genicular lobes with 1 long spine respectively; tibiae with 2 inner spines and 2 outer spines on ventral surface, apices with 1 pair of dorsal spines and 1 pair of ventral spines, between the paired ventral spines with 1 small spine. Hind femora with 6–9 inner spines on ventral margin; tibiae with 32–37 inner spines and 34–36 outer spines on dorsal surface, subapices with 1 pair of dorsal spines, apices with 1 pair of dorsal spines and 2 pairs of ventral spines, interio-dorsal spine slightly longer than hind basitarsi, hind basitarsi with 2 dorsal spines (Fig. 14F).

Base of posteromedian process of 7th abdominal tergite broad, both sides of apical half nearly parallel, the middle of apex slightly prominent (Fig. 14D–E). Basal half of paraproct slightly broad, apical half narrow, apex obtuse, directing dorso-backward (Fig. 14D). Cerci slender, conical, apices acute. Genitalia completely membranous, with 8 lobes, apex of dorso-median lobe truncate, ventro-median lobe slightly shorter, apex with 1 obviously notch (Fig. 14E–F).

Female. Base of ovipositor slightly broad, narrowing to apex, dorsal valvulae smooth, apical areas of ventral surfaces of ventral valvulae denticulate (Fig. 14H). Subgenital plate nearly triangular, broad and short, both sides of basal area with 1 small process respectively, apex obtusely rounded (Fig. 14G).

Coloration. Body light brown, one specimen collected from Bozhushan, Wenshan, Yunnan reddish-brown. Eyes black, subsequently with black stripes. Face with 4 longitudinal black stripes, some specimens with only 2 longitudinal black stripes. Both sides of clypeus with 1 black spot respectively. Apices of all femora black, spines of hind femora and tibiae black.

Material examined. Holotype: male, Wenlongxiang, Jingdong, Pu’er, Yunnan, 31 July, 2017, coll. Tao Wang . Paratypes: 1 female, Wenlongxiang, Jingdong, Pu’er, Yunnan, 30 July, 2017, coll. Tao Wang ; 1 male, Bozhushan, Wenshan, Yunnan, 5 August, 2017, coll. Yongxia Wu and Yujie Dou ; 1 male and 1 female, Xiaojie, Wenshan, Yunnan, 31 July, 2017, coll. Yongxia Wu and Yujie Dou .

Measurements (mm). Body: ♂ 22.0–23.0, ♀ 18.2–19.8; pronotum: ♂ 6.1–6.2, ♀ 5.8–6.2; fore femora: ♂ 10.8– 11.8, ♀ 9.2–11.0; hind femora: ♂ 21.0–24.0, ♀ 18.0–22.8; hind tibiae: ♂ 21.2–24.2, ♀ 18.1–23.4; hind basitarsi: ♂ 4.6–5.2, ♀ 4.0–4.2; ovipositor: 12.9–16.2.

Distribution. China (Yunnan).

Discussion. The new species differs from Diestramima triangulata Qin, Wang, Liu & Li, 2016 and Diestramima beybienkoi Qin, Wang, Liu & Li, 2016 by: base of posteromedian process of 7th abdominal tergite broad, both sides of apical half nearly parallel, the middle of apex slightly prominent; basal half of paraproct slightly broad, apical half narrow, apex obtuse, directing dorso-backward; apex of dorso-median lobe of male genitalia truncate.

Etymology. The name of the new species refers to the middle of apex of posteromedian process of 7th abdominal tergite slightly prominent, Latin subtil - means subtile .