Stegana (Steganina) flavivittata Li & Zhang & Chen 2019, sp. nov

Stegana (Steganina) flavivittata sp. nov. (Figs 2J, 13) Diagnosis. This species resembles S. flavipalpata Chen & Chen in Lu et al. 2011a in the yellow clypeus and palpus, and colour patterns of body (Fig. 2J), but can be distinguished by the aedeagus lacking serrated, minute processes basally in lateral view, and with round opening in ventral view (Fig. 13B, C). The minimum interspecific genetic distance to S. flavipalpata is 6.9 % (Table 2). ……continued on the next page Min. intra., minimum intraspecific distance; Max. intra., maximum intraspecific distance; Mean intra. Vari., mean intraspecific variability (standard deviation, SD); Min. inter., minimum interspecific distance; Max. inter., maximum interspecific distance; Mean inter. Vari., mean interspecific variability (SD); NA, not applicable. Description. Male and female. Frons black, with orange yellow stripe medially and band submedially. Frontoorbital plate orange yellow. First flagellomere medially grayish yellow on basal 2/3, black on distal 1/3. Face black on upper 2/3, yellow on lower 1/3. Mesonotum medially brown and with yellow, thin longitudinal stripe, laterally dark brown, with yellow longitudinal stripes and a few patches (Fig. 2J). Katepisternum entirely white (Fig. 2J). Scutellum brownish yellow medially, dark brown to balck laterally (Fig. 2J). Veins R 4+5 and M 1 lacking setae on basal section of dorsal surface. Legs white, brownish knee articulations of fore and hindlegs, and black on distal half of hindleg, distal half of femur and basal half of tibia of midleg. Fore femur distally with 6–8 setae on posteroventral surface. Abdominal 1st to 5th tergites dark brown to black medially, yellow laterally; 6th tergite nearly black. Sternites nearly yellow. Male terminalia (Fig. 13 A–F): Distal part of 10th sternite diamond-shaped, about 1.85 times as wide as long. Hypandrium anteromedially elongated, as long as width of epandrium and with a few paramedian setae posteroventrally. Gonopods slightly rounded apicoomedially. Aedeagus about 0.5 times as long as aedeagal apodeme. Female terminalia (Fig. 13 G–I): Epiproct, cercus and hypoproct with dense setae and pubescence. Eighth sternite mostly glabrous, with several setae and pubescence on posterolateral corners. Measurements. BL = 4.87 mm in holotype (mm in 5♂ and 5♀ paratypes: 3.20–4.67 in ♂, 4.13–4.53 in ♀), ThL = 2.53 mm (1.73–2.40 in ♂, 2.07–2.27 in ♀), WL = 3.47 mm (2.53–3.67 in ♂, 3.00– 3.47 in ♀), WW = 1.73 mm (1.20–1.80 in ♂, 1.33–1.87 in ♀), arb = 10/6 (8–10/4–6), avd = 0.67 (0.67–0.83), adf = 1.80 (1.50–2.00), flw = 1.50 (1.30–2.13), FW/HW = 0.42 (0.36–0.48), ch/o = 0.21 (0.20–0.36), prorb = 0.65 (0.67–1.00), rcorb = 0.87 (0.60–1.10), orbito = 2.14 (1.50–2.33), vb = 0.40 (0.18–0.45), sctl = 1.69 (1.29–2.50), sterno = 1.00 (0.50–0.94), sctlp = 1.25 (1.67–2.50), C = 2.80 (1.59–2.92), 4c = 0.83 (1.00–1.38), 4v = 1.92 (1.77–2.50), 5x = 1.75 (1.50– 2.50), ac = 5.00 (5.50–9.00), M = 0.58 (0.58–1.00), C3F = 0.80 (0.67–0.83). Specimens examined. Holotype ♂ (SCAU, No. 111489), China: Hesong, Menghai, Yunnan, 21°49′ N, 100°06′ E, altitude 1800m, 7.v.2012, tree trunk, HW Chen. Paratypes: China: 6♂, 5♀ (SCAU, Nos 111490 –500), same data as holotype; 1♂, 4♀ (SCAU, Nos 111501 –05), altitude 1600m, 12.v.2012, same data as holotype; 1♂, 1♀ (SCAU, Nos 111506, 07), Mengyuan, Mengla, Yunnan, 21°43'56''N, 101°23'15''E altitude 876m, 18.xii.2017, tree trunks, HW Chen; 1♀ (SCAU, No. 111508), Wangtianshu Forest Park, Mengla, Yunnan, 21°36'9''N, 101°35'6''E, altitude 640m, 16.iv.2010, tree trunk, HW Chen; 4♀ (SCAU, Nos 111509 –12), Menglai Grand Canyon, Cangyuan, Yunnan, 23°13'20''N, 99°15'4''E, altitude 1240m, 30.x.2017, tree trunks, HW Chen, L Gong, BX Li; 3♂, 1♀ (KIZ, Nos 0090665–68), Longtan Forest Park, Ximeng, Yunnan, 22°38'44''N, 99°35'39''E, altitude 1145m, 27.x.2017, tree trunks, HW Chen, L Gong, BX Li; 1♂ (SCAU, No. 111513), Moli Forest Park, Ruili, Yunnan, 24°7'5''N, 97°58'51''E, altitude 920m, 5.xi.2017, tree trunk, L Gong; 1♂, 8♀ (SCAU, Nos 111514 –22), Yixiang, Pu'er, Yunnan, 22°42'N, 101°09'E, altitude 1400m, 13.v.2012, tree trunks, HW Chen; 1♀ (SCAU, No. 111539), Tongbiguan, Yingjiang, Yunnan, altitude 1310m, 19.v.2016, tree trunks, J Huang; 2♀ (SCAU, Nos 111523, 24), Husa, Longchuan, Yunnan, 24°25'19''N, 97°46'38''E, altitude 1227m, 20,21. viii.2016, tree trunks, HW Chen, L Gong; 2♂, 5♀ (SCAU, Nos 111525 –1), Bangda, Mangshi, Yunnan, 24°7'55''N, 98°13'42''E, altitude 1780m, 8.xi.2017, tree trunks, HW Chen, L Gong, BX Li; 1♀ (SCAU, No. 111532), Botanic Garden, Ruili, Yunnan, 24°4'19''N, 97°49'8''E, altitude 1174m, 22.v.2016, tussock, J Huang; 1♂ (SCAU, No. 111542), Mengdong, Cangyuan, Yunnan, 23°10'8''N, 99°13'52''E, altitude 1320m, tussock, 6.V.2016, J Huang. Etymology. A combination of the Latin words: flavus and vittatus, referring to the mesonotum with yellow longitudinal stripes. Distribution. China (Yunnan).