Leucophenga tricuspidata sp. nov.

(Figs. 2 F, 4I, 4J, 5N, 11)

Diagnosis. This species is somewhat similar to L. bicuspidata sp. nov. in having the mesonotum and scutellum entirely yellowish in male (Figs. 3 E, 4I), and in the color patterns of abdominal tergites in male (Fig. 5 E, N), but can be distinguished from the latter by having the aedeagus dorsolaterally with a thin process and distolaterally with three acute processes (Fig. 11 D).

Description. Ocellar triangle brownish, with ca. 2 setae above ocellar setae. Frons yellow. Pedicel yellowish; first flagellomere yellow. Clypeus brownish yellow. Palpus brownish yellow. Postpronotal lobe yellowish (Fig. 4 J). Acrostichal setulae in ca. 8 irregular rows (Fig. 4 I). Pleura, katepisternum and meron yellowish (Fig. 4 J). Wing (Fig. 2 F): Costal vein between R2+3 and R4+5 distally with ca. 5 peg-like spinules on ventral surface. Only 4th to 6th abdominal tergites with black patches in male (Fig. 5 N). Male terminalia: Epandrium with a few pubescence near posterior and ventral margin, with ca. 4 setae near posterior margin and ventral corner per side (Fig. 11 A). Paramere nearly triangular, narrowed basally and apically, with ca. 3 sensilla distally (Fig. 11 C).

Measurements. BL = 2.40 mm in holotype, THL = 1.13 mm, WL = 2.07 mm, WW = 0.93 mm, arb = 6/3, avd = 0.75, adf = 2.67, flw = 2.17, FW/HW = 0.32, ch/o = 0.03, prorb = 0.68, rcorb = 0.79, vb = 0.36, dcl = 0.50, presctl = 0.50, sctl = 1.15, sterno = 0.75, orbito = 1.00, dcp = 0.31, sctlp = 1.07, C = 1.70, 4c = 2.00, 4v = 3.10, 5x = 1.58, ac = 2.86, M = 0.95, C3F = 0.73.

Type specimens. Holotype Ƌ (SCAU, No. 128864), CHINA: Menglun, Mengla, Yunnan, 780m, 17.iv.2007, ex tussock, HW Chen.

Distribution. China (Yunnan).

Etymology. A combination of the Latin words “ tri- ” (= three) + “ cuspidatus ” (= acute), referring to the aedeagus distolaterally with three acute processes.