Stegana (Steganina) radiciflava Zhang & Chen, sp. nov.

(Figs. 12I, 12J, 57)

Diagnosis. This species closely resembles S. (S.) kanmiyai Okada & Sidorenko, 1992 in the shape of male terminalia (as fig. 3E–G in Okada & Sidorenko 1992, Fig. 57), but can be distinguished from the latter by having the surstylus with 1 peg-like tooth near distal margin, lacking seta (Fig. 57A); the hypandrium only slightly expanded anteromedially (Fig. 57B, C); the pregonite small, with 2 sensilla (Fig. 57B, C); the aedeagus rounded distally (Fig. 57B, C).

Description. Male: First flagellomere yellow on basal 2/3, brown on distal 1/3. Clypeus brownish medially, yellow laterally. Mesonotum dark brown medially, yellow laterally (Fig. 12I). Katepisternum yellowish (Fig. 12J). Scutellum dark brown, yellow at tip (Fig. 12I). Halter mostly white (Fig. 12J). Fore femur with a row of 5 long setae on distal part of posteroventral surface. Abdominal tergites dark brown to black (Fig. 12I, J); sternites black, about 2 times as wide as long. Male terminalia (Fig. 57): Epandrium with ca. 17 setae on dorsal to posterior portions per side (Fig. 57A). Surstylus with numerous minute, serrated processes, lacking pubescence (Fig. 57A). Cercus with much pubescence (Fig. 57A). Pregonite small, with 2 sensilla (Fig. 57B, C). Aedeagus distally rounded and with numerous symmetric, serrated processes distally (Fig. 57B, C). Subepandrial sclerite deeply split medially (Fig. 57D).

Measurements and indices. BL = 3.67 mm in holotype, ThL = 1.53 mm, WL = 2.80 mm, WW = 1.33 mm, arb = 8/5, avd = 0.63, adf = 1.00, flw = 1.50, FW/HW = 0.39, ch/o = 0.33, prorb = 0.61, rcorb = 0.78, vb = 0.50, dcl = 0.39, presctl = 0.61, sctl = 1.82, sterno = 0.75, orbito = 2.00, dcp = 0.17, sctlp = 2.42, C = 1.86, 4c = 1.40, 4v = 2.20, 5x = 2.00, ac = 7.00, M = 1.00, C3F = 0.79.

Type material. Holotype ♂ (SCAU, No.125635, DNA #1434), CHINA: Hesong, Menghai, Yunnan, 21°50'17''N, 100°05'48''E, alt. 1600m, 12.v.2012, ex tree trunk, H.W. Chen.

Distribution. China (Yunnan).