Arcofacies varius, Li & Yang & Chen, 2019

Arcofacies varius View in CoL sp. nov.

( Figs 13–24 View FIGURES 13–24 )

Measurements. Body length including forewing: male 2.9–3.0 mm ( N = 2), forewing length: male 2.3–2.4 mm ( N = 2).

Diagnosis. The salient features of the new species include the following: anal segment of male with lateroapical processes asymmetrical, left one distinctly longer than right one ( Fig. 21 View FIGURES 13–24 ); pygofer in posterior view with 4 spinous medioventral processes ( Fig. 19 View FIGURES 13–24 ); aedeagus with long spinous process at base, apex acute, directed ventrad, middle ventral margin of aedeagus without process ( Fig. 22 View FIGURES 13–24 ); apex of genital style not forked ( Figs 23, 24 View FIGURES 13–24 ).

Coloration. General color yellowish brown with green. Frons, vertex, pronotum and mesonotum with median carina white bordered with blackish brown ( Figs 15–17 View FIGURES 13–24 ). Eyes dark brown to blackish brown; ocelli reddish brown. Antennae with dorsal and ventral margins and apex of scape, base and near apex of pedicel dark brown to blackish brown ( Fig. 16 View FIGURES 13–24 ). Lateral margins of frons, gena, vertex and pronotum each with oblique white band bordered with brown or dark brown ( Figs 15, 16 View FIGURES 13–24 ). Cypeus yellowish white ( Fig. 16 View FIGURES 13–24 ). Forewings with yellowish brown over basal third, rest area hyaline, along transverse vein and apical veins with brown stripes as figured ( Fig. 18 View FIGURES 13–24 ), in dark portion veins with white spots. Wings hyaline with brown veins. Legs yellowish brown. Abdomen with dorsum dark brown.

Head and thorax. Vertex ( Fig. 15 View FIGURES 13–24 ) wider at base than long submedially about 1.55: 1. Frons longer in middle line than wide at widest part about 1.26: 1, widest just above ocelli.Antennae surpassing frontoclypeal suture, scape long equal to wide, shorter than pedicel about 0.38: 1 ( Fig. 16 View FIGURES 13–24 ). Pronotum shorter than vertex about 0.70: 1. Mesonotum longer in middle line than vertex and pronotum combined about 1.84: 1 ( Fig. 15 View FIGURES 13–24 ). Forewing in middle line longer than wide at widest part about 2.34: 1 ( Fig. 18 View FIGURES 13–24 ).

Male genitalia. Anal segment of male short, lateroapical angles produced into stout spinous process respectively, asymmetric, left one distinctly longer than right one ( Fig. 21 View FIGURES 13–24 ). Pygofer in posterior view ventral margin with four medioventral processes, finger-like ( Fig. 19 View FIGURES 13–24 ), in lateral view ventral angles distinctly produced ( Fig. 20 View FIGURES 13–24 ). Aedeagus ( Fig. 22 View FIGURES 13–24 ) with long spinous process at base, S-shaped curved, apex acute, directed ventrad. Genital styles divergent, long, reaching ventral margin of anal segment, broad at base, narrowing to apex ( Figs 23, 24 View FIGURES 13–24 ).

Type materials. Holotype ♂, China: Yunnan, Mengla County ( 21°55´N, 101°15´E), on bamboo, 26 Apr. 2015, Zheng-Xiang Zhou; paratype, 1♂, same data as holotype, Qiang Luo. GoogleMaps

Remarks. This species is similar to A. strigatipennis Ding, 1990 but differs by: (1) anal segment of male with lateroapical processes asymmetrical, left one distinctly longer than right one ( Fig. 21 View FIGURES 13–24 ) (anal segment with lateroapical processes symmetrical in A. strigatipennis ); (2) pygofer in posterior view with 4 spinous medioventral processes ( Fig. 19 View FIGURES 13–24 ) (pygofer in posterior view without medioventral process in A. strigatipennis ); (3) aedeagus with long spinous process at base, middle ventral margin without process ( Fig. 22 View FIGURES 13–24 ) (aedeagus broad at base, nearly quadrate, middle of dorsal margin and ventral margin each with process in A. strigatipennis ).

Etymology. The specific name is derived from the Latin word “ varius ” (meaning different, changeable), referring to the anal segment with two asymmetrical processes.

Host plant. Bamboo.

Distribution. China ( Yunnan).