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

(Figs. 13A, 13B, 58)

Diagnosis. This species is similar to S. (S.) flavipes sp. nov. in the shape of male terminalia (Figs. 38, 58), but can be distinguished from the latter by having the surstylus laterally with some minute, serrated processes (Fig. 58A, B); the aedeagus with some pubescence distoventrally (Fig. 58C, D); the subepandrial sclerite vaulted (Fig. 58G).

Description. Male: First flagellomere brown. Clypeus yellow. Mesonotum yellow (Fig. 13A). Katepisternum yellowish (Fig. 13B). Scutellum yellow, brownish near distal margin (Fig. 13A). Halter mostly brownish (Fig. 13B). Fore femur with 4 thin, long setae on distal part of posteroventral surface. Abdominal tergites brownish (Fig. 13A, B); sternites yellow, about 1.6 times as wide as long. Male terminalia (Fig. 58): Epandrium with ca. 8 setae on dorsal to posterior portions per side (Fig. 58A). Surstylus slightly oval, with some setulae along distal margin and inner surface, lacking pubescence (Fig. 58A, B). Cercus with sparse pubescence (Fig. 58A). Hypandrium expanded anteromedially (Fig. 58C, D). Pregonite small, with 2 sensilla (Fig. 58C, D). Aedeagus tubular, distally slightly expanded, distoventrally with 3 rugae per side, lacking serrated process (Fig. 58C, D). Aedeagal sheath small, lacking serrated process (Fig. 58E, F).

Measurements and indices. BL = 2.67 mm in holotype, ThL = 1.15 mm, WL = 2.32 mm, WW = 1.01 mm, arb = 6/5, avd = 0.76, adf = 0.93, flw = 1.76, FW/HW = 0.37, ch/o = 0.28, prorb = 0.87, rcorb = 0.68, vb = 0.60, dcl = 0.61, presctl = 0.80, sctl = 2.10, sterno = 0.76, orbito = 1.67, dcp = 0.21, sctlp = 1.51, C = 1.66, 4c = 1.07, 4v = 1.63, 5x = 1.23, ac = 9.27, M = 0.52, C3F = 0.62.

Type material. Holotype ♂ (SCAU, No. 125656, DNA #2705), Menglun, Mengla, Yunnan, 21°47'29''N, 101°22'59''E, alt. 560m, 16,17. iv.2007, ex tree trunk, H.W. Chen.

Distribution. China (Yunnan).

Etymology. From the word " rava " in Dai language from the Dai nationality living in Yunnan, China, referring to the meaning "a happy place".