Neosymplana vittatum Gong, Yang & Chen, sp. n.

Figs 1–17, 19–21

Measurements. Body length including forewing: male 6.8–6.9 mm (N = 6), female 6.8–7.5 mm (N = 8); forewing length: male 5.3–5.5 mm (N = 6), female 5.3–5.8 mm (N = 8).

Description. Coloration. General coloration pale yellow with somewhat green (Figs 1–4). Ocelli reddish brown, eyes black brown. Pedicel with a black transverse spot near apex. Frons mostly blackish brown. Clypeus yellow. Vertex slightly brown. Forewing subhyaline, with a small light brown longitudinal stripe in middle, with two smaller stripes near posterior margin and a large dark brown longitudinal stripe running from its apical 1/4 to its apical margin. Hindwing hyaline. Abdominal sternites with lateral margins fuscous.

Head and thorax. Vertex (Fig. 5) longer in middle line than broad at base (2.0:1). Frons (Fig. 6) 1.9 times longer in middle line than widest part. Pronotum (Fig. 5) shorter in middle line than vertex (1:2.8). Mesonotum (Fig. 5) 0.7 times as long as vertex and pronotum together in middle line. Forewing (Fig. 8) with length 4.7 times than broad at widest part. Hindwing (Fig. 9) with length 2.0 times than broad at widest part.

Male genitalia. Anal segment in dorsal view (Fig. 10) with base mostly stout, broadening to apical part, at widest past bifurcated, each side with one stick-like process, slightly curved in the middle, apex with two branches with some micro teeth; in lateral view (Fig. 11) dorsal margin slightly concave, apically broadening to apical 1/3 widest, thence narrowed, apical 1/3 abruptly narrowed, ventral margin roundly concave in the middle. Pygofer in lateral view (Fig. 11) with dorsal margin distinctly shorter than ventral margin, posterior margin with upper 1/5 roundly convex, lower 1/4 strongly convex; in posterior view (Fig. 13) nearly oval, with length 1.9 times as long as widest part; in ventral view (Fig. 15) with a stout and short medioventral plate at posterior margin, roundly concave in the middle, anterior margin roundly convex. Genital style in lateral view (Fig. 14) with apical margin broadly concave, dorsal margin with apical half dorsally uplifted; in ventral view (Fig. 15) with apex nearly hook-like. Aedeagus in lateral view (Fig. 16) with base slightly broad, narrowing apically, periandrium curved ventrally; in dorsal view (Fig. 17) with basal half broad, apical half abruptly narrowed, stick-like, each side with one spine-like aedeagal process at widest past.

Type material. Holotype: ³, China: Yunnan Province, Yingjiang County, Yingjiang National Wetland Park (24°69'N, 97°93'E), on bamboo, 17 August 2015, Xiangshen Chen.

Paratypes: 3³³, 2♀♀, data same as holotype, Lin Yang; 20³³, 32♀♀, data same as holotype, 16 August 2018, Qiang Luo and Nian Gong; 2³³, 4♀♀, China: Yunnan Province, Longchuan County, Chengguan (24°33'N, 97°96'E), on bamboo, 19 August 2015, Xiangshen Chen and Lin Yang; 5³³ , 8♀♀, China: Yunnan Province, Li- anghe County, Mengyang Town (24°78'N, 98°3'E), on bamboo, 25 July 2013, Weicheng Yang; 12³³ , 23♀♀, China: Yunnan Province, Ruili County, Wanding Town (24°N, 97°83'E), on bamboo, 25 August 2018, Hongxing Li and Liangjin Yang .

Host plant. Bamboo ( Bambusa burmanica Gamble).

Distribution. Southwestern China (Yunnan Province).

Etymology. The specific name is derived from the Latin word “ vittatus ” which refer to its forewing with stripe.