Bacchisa basalis (Gahan, 1894)

He, Si-Yao, Chen, Li & Liu, Zhi-Ping, 2015, Comparative morphology study of the male genitalia in the tribe Astathini from China (Coleoptera: Cerambycidae), Zoological Systematics 40 (2), pp. 197-211 : 204

3.1.4 Bacchisa basalis (Gahan, 1894) ( Figs 5B , 6B, 7D)

Tegmen about 4.5 times as long as wide, curved; lateral lobes short, about 1/8 times as long as tegmen, subcylindrical, about twice as long as wide; transparent except base; with dense long hairs at middle; roof nearly as long as lateral lobes; apex dehiscent; apical margin arcuate; ringed part converging at apex, apex fishtail. Median lobe plus median struts curved, about 5.9 times as long as wide; median lobes 1.6 times as long as median struts; dorsal plate slightly shorter than ventral plate, apex pointed. Internal sac with rod at apex, rod longer than median lobe plus median struts. 8th abdominal tergaum sub-trapezoidal, 0.8 times as long as wide; apex slightly concave, with dense long setae; 8th abdominal sternum slightly shorter and narrower than tergaum, apex strong concave, with dense long setae on lateral sides; spiculum gastrale long, about 1.9 times as long as tergaum.

Figures

Fig. 5. Tegmen of Bacchisa, dorsal view. A–F. R2> 1/20. A. B. atritarsis. B. B. basalis. C. B. comate. D. B. dioica. E. B. fortunei. F.B. rigida. G. R2 <1/20, B. guerryi. Scale bar=0.5mm.