Stegana (Steganina) menglian Li & Chen, sp. nov.

(Figs. 11G, 11H, 51)

Diagnosis. This species is similar to S. (S.) lancang sp. nov. in the shape of male terminalia (Figs. 46A–G, 51), but can be distinguished from the latter by having the surstylus lacking serrated process (Fig. 51A, B); the aedeagus lacking a row of serrated processes distoventrally (Fig. 51C, D).

Description. Male and female: First flagellomere yellowish brown. Clypeus yellow. Mesonotum dark brown medially, brown laterally (Fig. 11G). Katepisternum mostly yellowish, brownish on anterior corner (Fig. 11H). Scutellum dark brown, yellow at tip (Fig. 11G). Halter mostly white (Fig. 11H). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites black (Fig. 11G, H); sternites brown, about 2 times as wide as long. Male terminalia (Fig. 51): Epandrium with ca. 14 setae on dorsal to posterior portions per side (Fig. 51A). Surstylus with 1 peg-like tooth and some setulae near distal margin, lacking pubescence (Fig. 51A, B). Cercus with much pubescence (Fig. 51A). Hypandrium roundly expanded anteromedially (Fig. 51C, D). Pregonite with 2 sensilla (Fig. 51C, D). Aedeagus roundly expanded distally, with several minute, serrated processes distolaterally and some pubescence distoventrally (Fig. 51C, D). Aedeagal sheath distally strongly dorsad curved and with several minute, serrated processes (Fig. 51E, F). Subepandrial sclerite nearly vaulted (Fig. 51G).

Measurements and indices. BL = 2.21 mm in holotype (2.43 in 1♂, 2.73–2.79 in 2♀ paratypes), ThL = 1.08 mm (1.21 in ♂, 1.32–1.36 in ♀), WL = 2.09 mm (2.12 in ♂, 2.46–2.52 in ♀), WW = 0.88 mm (0.91 in ♂, 0.99–1.04 in ♀), arb = 7/4 (5–6/3–4), avd = 0.84 (0.77–0.88), adf = 0.97 (1.11–1.26), flw = 1.77 (1.73–1.93), FW/HW = 0.40 (0.41–0.45), ch/o = 0.30 (0.25–0.27), prorb = 1.18 (1.04–1.20), rcorb = 0.78 (0.57–0.71), vb = 0.71 (0.71–0.72), dcl = 0.74 (0.53–0.80), presctl = 0.67 (0.47–0.88), sctl = 1.44 (1.57–1.92), sterno = 0.79 (0.60–0.85), orbito = 1.46 (1.19–1.40), dcp = 0.30 (0.32–0.37), sctlp = 1.92 (1.41–1.79), C = 1.68 (1.62–1.82), 4c = 1.10 (1.30–1.36), 4v = 1.42 (1.86–2.07), 5x = 1.55 (1.34–1.50), ac = 10.86 (9.18–10.22), M = 0.70 (0.62–0.65), C3F = 0.61 (0.55–0.62).

Type materials. Holotype ♂ (SCAU, No. 125725, DNA #2673), CHINA: Jinshan, Menglian, Yunnan, 22°19'29''N, 99°35'00''E, alt. 940m, 25.x.2017, ex tree trunk, H.W. Chen. Paratypes: 1♀ (SCAU, No. 125726, DNA #2692), other data same as holotype; 1♂, 1♀ (SCAU, Nos. 125727, 28, DNA #2720), Longtan Park, Ximeng, Yunnan, 22°38'55''N, 99°36'02''E, alt. 1150m, 17.iv.2018, ex tree trunks, L. Gong, Y. Lin.

Distribution. China (Yunnan).

Etymology. From the name of the type locality "Menglian".