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

(Figs. 4G, 4H, 19)

Diagnosis. This species differs from the other species of the nigrolimbata species group in having the yellow body color (Fig. 4G, H); the surstylus slightly triangular, lacking scale-like process (Fig. 19A, B); the aedeagal sheath not expanded distolaterally, with some minute, serrated processes (Fig. 19E, F).

Description. Male: Frons yellowish brown, lacking black band. First flagellomere yellow. Face black, with 1 yellow band medially. Clypeus black medially, yellow laterally. Palpus yellow basally, dark brown distally. Gena narrow and yellow. Mesonotum and scutellum mostly yellow (Fig. 4G). Katepisternum yellowish above, brownish below (Fig. 4H). Halter brownish basally, grey distally (Fig. 4H). Fore femur with 4 thin, long setae on distal part of posteroventral surface. Abdominal tergites yellow (Fig. 4G, H); sternites brownish, slightly wider than long. Male terminalia (Fig. 19): Epandrium with ca. 28 setae on dorsal to posterolateral portions per side (Fig. 19A). Surstylus with numerous setae near margin, lacking pubescence (Fig. 19A, B). Cercus lacking pubescence (Fig. 19A). Hypandrium expanded anteromedially (Fig. 19C, D). Pregonite blurry or absent (Fig. 19C, D). Aedeagus with much pubescence basally (Fig. 19C, D). Phallapodeme (aedeagal apodeme in McAlpine 1981) podgy (Fig. 19C, D).

Measurements and indices. BL = 2.93 mm in holotype, ThL = 1.46 mm, WL = 2.64 mm, WW = 1.28 mm, arb = 6/3, avd = 0.67, adf = 1.31, flw = 1.95, FW/HW = 0.36, ch/o = 0.10, prorb = 0.32, rcorb = 0.75, vb = 0.49, dcl = 0.61, presctl = 0.50, sctl = 1.17, sterno = 0.71, orbito = 1.58, dcp = 0.29, sctlp = 1.50, C = 1.78, 4c = 1.15, 4v = 1.55, 5x = 0.95, ac = 10.20, M = 0.44, C3F = 0.65.

Type material. Holotype ♂ (SCAU, No. 125407, DNA #2460), CHINA: Husa, Longchuan, Yunnan, 24°28'21''N, 97°54'06''E, alt. 1340m, ex tree trunk, 7.xi.2017, H.W. Chen.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words " bi -" (= two) and " barbatus " (= beard), referring to the pair of long, filar processes of aedeagus.