Bacchisa dioica (Fairmaire, 1878)

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 : 206

3.1.6 Bacchisa dioica (Fairmaire, 1878) ( Figs 4E–F , 5D , 6D, 7C)

Tegmen about 3.5 times as long as wide, slightly curved; lateral lobes short, about 1/12–1/14 times as long as tegmen, sub-cylindrical, about 0.7–1.0 times as long as wide; with sparse hairs; roof long, about 2.0–2.3 times as long as lateral lobes; apex dehiscent; ringed part converging at apex, apex fishtail. Median lobe plus median struts slightly curved, about 6.2 times as long as wide; median lobes 2.7 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 and a little thicker at middle. 8th abdominal tergaum square; apex slightly concave, densely covered with long hairs on lateral sides; 8th abdominal sternum shorter and narrower than tergaum, apex slightly concave, with dense long hairs; spiculum gastrale long, about 1.4 times as long as dorsal plate.

Figures

Fig. 4. Median lobe plus median struts and rod at apex of internal sac, dorsal view. A–B. Anastathes parvus hainana. C–D. A. robustus. E–F. Bacchisa dioica. G–H. Plaxomicrus ellipticus. I–J. Tetraophthalmus episcopalism. K–L. T. janthinipennis cyanopterus. M–N. T. janthinipennis janthinipennis. Scale bars=0.5mm.

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.