Stegana (Steganina) marenubila Cui & Chen, sp. nov.

(Figs. 5A, 5B, 21)

Diagnosis. This species resembles S. (S.) crinata Zhang & Chen, 2015 in the shape of epandrium, surstylus, and cercus (as fig. 2 in Zhang & Chen 2015, Fig. 21A), but can be distinguished from the latter by having the aedeagus with 3 pair of basally fused processes: ventral pair small, medial pair slender, and dorsal pair strong (Fig. 21B, C).

Description. Male and female: Frons yellow in male, brown in female. First flagellomere yellow in male, brown in female. Face black, with 1 yellow band medially; facial carina absent. Clypeus black. Palpus mostly yellow. Mesonotum and scutellum yellow in male (Fig. 5A, B), brownish in female. Katepisternum yellowish (Fig.

5B). Halter mostly grey (Fig. 5B). Fore femur with 3 thin, long setae on distal part of posteroventral surface. Abdominal tergites yellow (Fig. 5A, B), 4th to 6th tergites brownish medially in female; sternites yellow, about 2 times as wide as long. Male terminalia (Fig. 21): Epandrium with ca. 8 setae on dorsal to posterior portions per side (Fig. 21A). Surstylus lacking pubescence (Fig. 21A). Cercus with much pubescence (Fig. 21A). Hypandrium slightly expanded anteromedially (Fig. 21B, C). Pregonite blurry or absent (Fig. 21B, C). Junction between hypandrium and aedeagus with 3 sensilla per side (Fig. 21B, C).

Measurements and indices. BL = 2.45 mm in holotype (2.73 in 1♀ paratype), ThL = 1.21 mm (1.19), WL = 2.56 mm (2.75), WW = 0.93 mm (1.12), arb = 7/4 (7/5), avd = 0.73 (0.67), adf = 1.07 (1.21), flw = 1.42 (1.69), FW/ HW = 0.32 (0.37), ch/o = 0.24 (0.24), prorb = 0.96 (0.90), rcorb = 1.20 (0.54), vb = 0.57 (0.46), dcl = 0.28 (1.22), presctl = 0.38 (0.38), sctl = damaged (2.63), sterno = 0.41 (0.46), orbito = 2.22 (1.89), dcp = 0.53 (0.30), sctlp = 1.50 (1.39), C = 2.20 (2.16), 4c = 1.62 (1.02), 4v = 2.49 (1.75), 5x = 1.29 (1.42), ac = 10.75 (8.46), M = 0.93 (0.56), C3F = 0.64 (0.60).

Type materials. Holotype ♂ (SCAU, No. 125411, DNA #2347), CHINA: Manghai, Mangshi, Yunnan, 24°07'03''N, 98°19'04''E, alt. 1720m, 8.xi.2017, ex tree trunk, H.W. Chen . Paratype: 1♀ (SCAU, No. 125412, DNA #2747), other data same as holotype.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words " mare " (= sea) and " nubilus " (= nubilous), referring to the meaning of the type locality (Manghai: a sea of clouds).