Falsorsidis griseofasciatus (Pic, 1926)

(Figs 1, 2, 5)

Orsidis griseofasciata Pic, 1926: 15 .

Falsorsidis griseofasciatus: BREUNING (1963: 503); BREUNING (1975: 46).

Type material. HOLOTYPE: J, VIETNAM: ‘ Tonkin’ (MNHN). One photograph examined, provided by Tomáš Tichý.

Additional material examined. CHINA: GUANGXI: 1 ♀, ‘China, Guangxi Prov. / Jinxiu County / Yinshan Baohuzhan / 2011.VII.23 / 1,200 m / Peng Zhong leg.’ (CBWX); 1 ♀, ‘China, Guangxi, Jinxiu, Dayaoshan / Luoyingou, 1,200 m / 2016.V.3 / leg. Jin-Teng Zhao’ (CCCC); 1 ♀, ditto except ‘ 2016.V.7 ’ (CCCC); 1 J 1 ♀, ditto except ‘ 1,150 m / 2017.V.10 ’ (CCCC); 1 J, ditto except ‘ 2017.VI.4 ’ (CCCC); 1 J 1 ♀, ditto except ‘ 1,200 m / 2017.V.21 ’ (CCCC); 2 JJ 1 ♀, ditto except ‘ 2017.VI.8 ’ (CCCC); 1 J 1 ♀, ditto except ‘ 1,180 m / 2017.V.31 ’ (CCCC); 1 ♀, ditto except ‘Jiuershan, 1,250 m / 2016.V.29 ’ (CCCC); 1 ♀, ditto except ‘Luomengshan, 1,150 m / 2016.VI.18 ’ (CCCC); 1 J, ditto except ‘Wugonglilinchang, 1,350 m / 2016.VI.24 // ED-0408’ (CCCC); 1 ♀, ditto except ‘Shengtangshan, 1,500 m / 2016.VI.25 ’ (CCCC); 1 J, ditto except ‘Pingbanshan, 1,250 m / 2017.V.2 ’ (CCCC); 1 ♀, ditto except ‘Fenzhantun, 900 m / 2017.V.18 ’ (CCCC); 1 ♀, ‘Guangxi, Nanning, Damingshan / Tianping Baohuzhan (16–24 km) / 2011,V,23, 900–1,260 m // 23.51770°, 108.39295°E / leg. Xin-Lei Huang’ (IZAS); 1 J, ‘Guangxi, Damingshan, 24KM / 2011.VII.1 / leg. Chao Li’ (IZAS).

Complementary description. Male (Fig. 1). Body length 8.2–10.5 mm, humeral width 2.6–3.3 mm. Head and pronotum covered with sparse yellowish pubescence, not obscuring integument; elytra densely clothed with light yellowish and blackish suberect pubescence, with the latter forming one transverse band occupying basal fourth with sinuate posterior margin, and another slightly broader band near apical third. Eyes deeply emarginate. Antennae ca. 1.9–2.1 times as long as body length; scape subcylindrical. Maxillary and labial palpi with terminal palpomeres broadened distally. Head, pronotum and elytra densely and deeply punctate throughout, punctures of elytra becoming shallower distally. Elytra about 2.1 times as long as maximum width across humeri. Hindwings well developed.

Male genitalia. Tergite VIII (Fig. 5a) roughly semicircular with apical margin bearing sparse moderately long setae. Tegmen (Fig. 5b) in lateral view moderately curved, rhombic in shape and widest near middle in ventral view; lateral lobes short, less than one-fourth of total length of tegmen, distinctly thickened at bases, sparsely provided with fine setae on apices. Median lobe (Fig. 5c) slightly shorter than tegmen, moderately curved in lateral view; apex subacute. Endophallus in everted condition (Fig. 5d) S-shaped, long and slender, ca. 3.5 times as long as median lobe; gently curved ventrally near basal third, strongly curved dorsally behind apical third; BPH, MPH and APH well-defined; crescent-shaped sclerites (cs) present; MPH subdivided into MT, CT and PB by weak constrictions; relative lengths of APH: MPH: BPH: PB: CT: MT = 1.0: 10.4: 2.0: 1.7: 2.8: 6.0. MT provided with small ventral swelling distally, CT roughly cylindrical, PB not swollen; APH strongly constricted distally, elongate conical, with reduced bb; apical furrow with internal membrane developed, elongate and sclerotized; spicules mainly distributed on CT where they form two oblique rings, and on most parts of PB and APH; ejaculatory ducts paired, gn situated at apex of APH which is associated with pair of undulate sclerites (Fig. 5e).

Female (Fig. 2). Body length 9.2–11.9 mm, maximum elytral width 3.1–3.9 mm. Almost identical to male in general appearance except for the following: body relatively stouter, antennae ca. 1.5–1.6 times as long as body length, maxillary and labial palpi with terminal palpomeres fusiform, elytra broadest in apical two fifths and legs relatively shorter.

Distribution. Vietnam: Tonkin (PIC 1926); China (new country record): Guangxi.