Arcofacies Muir, 1915

Li, Hongxing, Yang, Lin & Chen, Xiangsheng, 2019, Two new species of the bamboo-feeding planthopper genus Arcofacies Muir (Hemiptera: Fulgoroidea: Delphacidae) from China, Zootaxa 4706 (2), pp. 384-390 : 385

Genus Arcofacies Muir, 1915

( Figs 1–24 )

Type species. Arcofacies fullawayi Muir, 1915

Arcofacies Muir, 1915: 319 ; Kuoh et al. 1983: 45; Yang & Yang 1986: 34; Ding 1990: 74; Ding et al. 1999: 442; Ding 2006: 115; Chen et al. 2007: 684; Hou & Chen 2010: 52.

Diagnosis. General color yellowish green to yellowish brown. Frons, vertex, pronotum and mesonotum with median carina white bordered with dark brown or black. Lateral parts of pronotum each with oblique white band bordered with brown or dark brown. Forewings with light brown in basal third, apical portion hyaline, speckled with dark brown markings, in dark portion veins with white spots. Wings hyaline with brown veins. Head including eyes narrower than pronotum. Vertex trapeziform, with margins more or less well defined, wider at base than long submedially (1.70–1.88: 1), apical margin distinctly emarginate at both sides of median point, lateral carinae concave, submedian carinae transverse. Y-shaped carina without stalk, with very short arms, connecting submedian carinae which forms a small cell, in lateral view vertex and frons at right angle. Frons in middle line longer than wide at widest point (1.75–2.17: 1), widest at level of ocelli or at apex, lateral carinae convex at base, nearly straight below level of ocelli, median carina not well developed throughout, forked at extreme base. Postclypeus slightly wider at base than frons at apex, at right angle to frons, tricarinate. Rostrum almost extending to mesotrochanters. Eyes in dorsal view with lateral margin emarginated medially. Lateral ocelli present. Antennae cylindrical, scape distinctly longer than wide (1.60–2.00: 1), shorter than pedicel (0.52–0.59: 1). Pronotum with lateral carinae extending to hind margin, converging apically, median carina weak. Forewings tectiform at rest. M and Sc 1 of wing with a long common stalk, Cu 2 arising from tip of cross vein or basad. Spinal formula of hind leg 5-6-4. Anal segment of male collar-shaped, lateroapical angles produced into spinous processes or not. Pygofer in posterior view with opening longer than wide (1.29–1.6: 1), lateral margins strongly produced caudad medially or not, with a small medioventral process or not. Aedeagus tubular or flat, with spinous process or not, orifice subapical. Diaphragn armature sclerotized and pigmented, V-shaped. Diaphragm wide, membraneous. Genital styles long, simple, broad at base, narrowing apically, basal angle intumescent, apex twisting outward more or less ( Hou & Chen 2010).

Remarks. This genus is similar to Tropidocephala Stål and Arcofaciella Fennah but differs from them in the shape of the frons, vertex and forewings and in the relative size of the antennae ( Liang & Jiang 2005 (2004)).

Distribution. China (Fujian, Taiwan, Chongqing, Hong Kong, Hainan, Guizhou, Yunnan), Ceylon, Indonesia, Japan (Ryukyu Islands), Malaysia (Penang), Philippines (Luzon), Singapore.

Figures

FIGURES 1–12. Arcofacies longispinus sp. nov. 1. Male habitus, dorsal view; 2. Same, lateral view; 3. Head and thorax, dorsal view; 4. Face; 5. Frons, lateral view; 6. Forewing; 7. Male genitalia, ventral view; 8. Same, lateral view; 9. Aedeagus, left lateral view; 10. Same, right lateral view; 11. Genital style, ventral view; 12. Same, left lateral view. Scale bars: 0.5 mm (1, 2, 6); 0.2 mm (3–5, 7–12).

FIGURES 13–24. Arcofacies varius sp. nov. 13. Male habitus, dorsal view; 14. Same, lateral view; 15. Head and thorax, dorsal view; 16. Face; 17. Frons, lateral view; 18. Forewing; 19. Male genitalia, ventral view; 20. Same, lateral view; 21.Anal segment, right lateral view; 22. Aedeagus, left lateral view; 23. Genital style, ventral view; 24. Same, left lateral view. Scale bars: 0.5 mm (13, 14, 18); 0.2 mm (15–17, 19–24).