Gergithus bimaculatus Zhang and Che, 2009

(Figs. 43–64)

Gergithus bimaculatus Zhang and Che, 2009: 185 .

Supplementary description: Male length (N=2) (including tegmen): 4.5–5.0 mm, length of tegmen: 3.9–4.5 mm; female length (N=1) (including tegmen): 6.1 mm, length of tegmen: 5.6 mm.

Colouration: Male: Vertex green. Frons green with black fascia above frontoclypeal suture. Pronotum and mesonotum green (Figs. 43, 47, 48). Tegmen brown, green at base, with two black stripes, one along apical margin and other one parallel with it (Fig. 44). Female: Vertex dark brown. Frons dark brown and green at under part, with black fascia above frontoclypeal suture. Pronotum brown near anterior margin and black near posterior margin.

Mesonotum black (Figs. 45, 49, 50). Tegmen subhyaline with 4 dark marks: one wide circular stripe at basal half, one semicircular near front mark, the last two stripes at distal margin as in male tegmen (Fig. 46).

Female genitalia: Sternum VII with posterior margin slightly convex medially (Fig. 63). Anal tube nearly ovate in dorsal view, base wider than apex, widest at middle (Fig. 57). Anal column short (about 0.2 times as long as anal tube). Border of gonoplac between first and second gonoplac lobes obsolete, third gonoplac lobes membranous and fork strongly sclerotized (Figs. 58, 60). Proximal part of posterior connective lamina of gonopophysis IX slightly convex in lateral view, median field separate at apical third, lateral fields not projecting (Figs. 59, 61). Gonocoxa VIII nearly rectangular. Endogonocoxal process gradually narrowing apically. Anterior connective lamina of gonapophysis VIII bearing three teeth in apical group and two teeth with carinae in the lateral group (Fig. 62).

Female reproductive organs: Bursa copulatrix well-developed with slightly thin basal half and sac-like apical half. Posterior vagina thick and weakly sclerotized, with small sclerotized plate at base. Anterior vagina relatively thin. Oviductus communis comparatively thick and short. Spermatheca well-developed, ductus receptaculi elongate, diverticulum receptaculi distinctly dilatate, apical part distinctly wider than basal part, spermathecal pump comparatively long with compact helix-shaped loop (Fig. 64).

Material examined: 1 male (holotype, SWU), Zhadian Town, Gejiu, Yunnan Province, 20 July 2007, coll. Li Yin; 1 male, Wangxiangtai, Yuanjiang County, Yunnan Province, China, 2010 m, 22 July 2006, coll. Xu Zhang; 1 female, same location as anterior, 2020 m, 23 July 2006, coll. Xu Zhang.

Remarks: The external morphology of the specimens we examined differ from the holotype (Zhang, Y. and Che, Y. -L., 2009, Figs. 16–26) which is brown with pale yellow spots and without a stripe along the apical margin of tegmen, but the male genitalia match those of the holotype exactly and the variation in colour is therefore not regarded as having significance at the species level.