Leucophenga brevipenis Huang & Chen, sp. nov. (Figs. 3B, 6J–L, 10C, 14G, 14H, 25) Diagnosis. This species differs from the other species of the genus Leucophenga in having the epandrium entirely lacking seta (Fig. 25A); aedeagus subdorsolaterally with two long, subparallel processes; the thicker process bearing a sensillum at tip (Fig. 25D). Description. Ocellar triangle dark brown, with ca. 2 setae above ocellar setae. Postocellar setae minute (Fig. 6J). Frons brownish (Fig. 6J). Orb 3 and Orb 2 parallel (Fig. 6J). Pedicel brownish yellow to brownish; first flagellomere dark yellow (Fig. 6J). Clypeus entirely brownish yellow. Palpus brownish yellow (Fig. 6J). Mesonotum mostly brownish yellow (Fig. 6K). Postpronotal lobe dark yellow (Fig. 6L). Acrostichal setulae in ca. 12–14 irregular rows (Fig. 6K). Scutellum mostly brownish yellow (Fig. 6K). Pleura, katepisternum, and mesopleuron mostly dark yellow (Fig. 6L). Wing (Fig. 3B): entirely hyaline (Fig. 3B); costal vein between R 2+3 and R 4+5 distally with ca. 6 or 7 peg-like spinules on ventral surface; R 4+5 and M 1 slightly convergent distally; halter yellowish, usually with brownish yellow patches at stem and knob (Fig. 6K). Abdominal tergites black, 2nd tergite yellow medially and laterally, 3rd tergite not shortened, yellow anteriorly and laterally, 4th tergite yellow anteriorly (Fig. 10C). Male terminalia: Epandrium, cercus, and surstylus lacking pubescence (Fig. 25A). Hypandrium with 1 sensillum (Fig. 25B). Paramere narrow basally and apically, with ca. 3 sensilla medially and ca. 13 ones distally (Fig. 25C). Measurements and indices. BL = 4.00 mm in holotype (range in 3♂ and 1♀ paratypes: 3.33–3.67 in ♂, 3.03 in ♀), ThL = 1.80 mm (1.63–1.73 in ♂, 1.57 in ♀), WL = 2.87 mm (2.70–2.83 in ♂, 2.73 in ♀), WW = 1.38 mm (1.30–1.33 in ♂, 1.20 in ♀), arb = 8/5 (7–8/4–5), avd = 0.93 (0.86–0.94), adf = 1.88 (2.27–2.43), flw = 1.75 (1.87– 2.14), FW/HW = 0.31 (0.30–0.33), ch/o = 0.02 (0.03–0.03), prorb = 0.65 (0.64–0.68), rcorb = 0.80 (0.79–0.82), vb = 0.45 (0.53–0.56), dcl = damaged (0.46–0.50), presctl = damaged (0.50–0.52), sctl = damaged (1.18–1.26), sterno = damaged (0.83–0.88), orbito = 1.06 (1.06–1.14), dcp = 0.27 (0.30–0.34), sctlp = 1.03 (1.13–1.29), C = 1.88 (1.90–2.04), 4c = 1.24 (1.21–1.32), 4v = 1.69 (1.62–1.76), 5x = 1.11 (1.06–1.22), ac = 3.06 (2.88–3.40), M = 0.50 (0.49–0.52), C3F = 0.71 (0.71–0.75). Type specimens. Holotype ♂ (SCAU, No. 128605), CHINA: Guanlei, Mengla, Yunnan, 21°38'N, 101°10'E, alt. 562m, 20.iv.2016, ex tussock, J Huang. Paratypes: CHINA: 3♂ (SCAU, Nos 128606–08), same data as holotype; 1♀ (SCAU, No. 128609), Wangtianshu, Mengla, Yunnan, 21°28'N, 101°38'E, alt. 570m, 12.xi.2012, ex tussock, JJ Gao. Distribution. China (Yunnan). Etymology. A combination of the Latin words: “ brevis ” (= short) and “ penis ” (= aedeagus), referring to the short aedeagus.