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

(Figs. 7E, 7F, 34)

Diagnosis. This species resembles S. (S.) fusca sp. nov. in the small body size (BL ranged from 2.12–2.39 mm in measured specimens) and the relatively light body color (Figs. 7E, 7F, 8I, 8J), but can be distinguished from the latter by having the cercus with much pubescence (Fig. 34A); the aedeagus dramatically expanded distally, lacking pubescence (Fig. 34C, D).

Description. Male: First flagellomere black. Clypeus yellow. Mesonotum and scutellum brownish yellow (Fig. 7E, F). Katepisternum yellow (Fig. 7F). Halter mostly yellow, with a brownish patch at knob (Fig. 7E). Fore femur with a row of 3 long setae on distal part of posteroventral surface. Abdominal tergites brown medially, brownish near distal margin (Fig. 34A, B). Hypandrium roundly expanded anteromedially (Fig. 34C, D). Pregonite with 7 sensilla (Fig. 34C, D). Aedeagal sheath distally dorsad curved (Fig. 34E, F). Subepandrial sclerite slightly vaulted, broadened distally (Fig. 34G).

Measurements and indices. BL = 2.39 mm in holotype (2.12 in 1♂ paratype), ThL = 1.21 mm (0.88), WL = 2.36 mm (1.46), WW = 1.00 mm (0.64), arb = 7/5 (7/5), avd = 0.89 (0.83), adf = 1.37 (1.50), flw = 2.68 (3.00), FW/ HW = 0.36 (0.30), ch/o = 0.15 (0.15), prorb = 0.95 (1.00), rcorb = 0.74 (0.67), vb = 0.83 (0.71), dcl = 0.58 (0.56), presctl = 0.49 (0.45), sctl = 2.90 (2.50), sterno = 0.88 (0.73), orbito = 1.65 (1.72), dcp = 0.35 (0.31), sctlp = 1.93 (2.25), C = 1.67 (1.67), 4c = 1.21 (1.09), 4v = 1.75 (1.50), 5x = 1.60 (1.60), ac = 10.89 (12.00), M = 0.59 (0.36), C3F = 0.62 (0.67).

Type materials. Holotype ♂ (SCAU, No. 125729, DNA #2743), CHINA: Menglun, Mengla, Yunnan, 21°47'29''N, 101°22'59''E, alt. 580m, 19.iv.2007, ex tree trunk, H.W. Chen . Paratype: 1♂ (SCAU, No. 121114), other data same as holotype.

Distribution. China (Yunnan).

Etymology. From the Latin word " cultellus " (= knife), referring to the knife-liked facial carina.