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

(Figs. 8C, 8D, 37)

Diagnosis. This species closely resembles S. (S.) euryphylla Chen & Chen, 2009 in the shape of male terminalia (as figs. 14–20 in Chen & Chen 2009, Fig. 37), but can be distinguished from the latter by having the aedeagus distomedially and subdistolaterally lacking much pubescence (Fig. 37).

Description. Male and female: First flagellomere black. Clypeus yellow. Mesonotum brown to dark brown medially, yellow to brownish laterally (Fig. 8C). Katepisternum yellowish (Fig. 8D). Scutellum dark brown (Fig. 8C). Halter mostly brownish (Fig. 8D). Fore femur with 3 or 4 long setae on distal part of posteroventral surface. Abdominal tergites dark brown to black (Fig. 8C, D); sternites brown, slightly wider than long. Male terminalia (Fig. 37): Epandrium with ca. 11 setae on dorsal to posterior portions per side (Fig. 37A). Surstylus with minute, serrated processes and numerous setulae on outer surface, 1 peg-like tooth near distal margin (Fig. 37A, B). Cercus lacking pubescence (Fig. 37A). Hypandrium expanded anteromedially (Fig. 37C, D). Pregonite small, with 3 sensilla (Fig. 37C, D). Aedeagus distally broadened and with numerous minute, serrated processes, with a row of serrated processes laterally and some pubescence distoventrally (Fig. 37C, D). Aedeagal sheath distally dorsad curved and with several minute, serrated processes (Fig. 37E, F). Subepandrial sclerite rounded distally (Fig. 37G).

Measurements and indices. BL = 2.37 mm in holotype (2.19–2.39 in 3♂, 2.34–2.41 in 3♀ paratypes), ThL = 1.09 mm (1.09–1.12 in ♂, 0.95–1.21 in ♀), WL = 2.12 mm (2.03–2.13 in ♂, 1.91–2.32 in ♀), WW = 0.95 mm (0.87–0.97 in ♂, 0.84–1.01 in ♀), arb = 6/4 (6–7/4–5), avd = 0.71 (0.71–0.86), adf = 1.46 (1.05–1.34), flw = 1.85 (1.67–2.05), FW/HW = 0.44 (0.38–0.42), ch/o = 0.32 (0.25–0.38), prorb = 0.83 (0.68–1.32), rcorb = 0.67 (0.59– 0.92), vb = 0.51 (0.50–0.71), dcl = 0.76 (0.53–0.81), presctl = 0.65 (0.55–0.78), sctl = 1.96 (1.61–2.13), sterno = 0.71 (0.55–1.39), orbito = 2.00 (1.50–2.08), dcp = 0.29 (0.27–0.42), sctlp = 1.39 (1.39–1.82), C = 1.99 (1.71–2.13), 4c = 1.25 (1.00–1.59), 4v = 2.25 (1.57–2.37), 5x = 1.34 (1.32–1.75), ac = 8.44 (8.87–12.29), M = 0.71 (0.59–0.96), C3F = 0.60 (0.47–0.61).

Type materials. Holotype ♂ (SCAU, No. 125710, DNA #2659), CHINA: Wangtianshu, Mengla, Yunnan, 21°36'09''N, 101°35'06''E, alt. 670m, 25.iv.2017, ex tree trunk, H.W. Chen . Paratypes: 3♂, 3♀ (SCAU, Nos. 125711–16, DNA #2691), other data same as holotype.

Distribution. China (Yunnan).

Etymology. From the Latin word " flabellum " (= knife), referring to the distally broadened aedeagus.