Identification key to the species of Gergithus (Maculergithus):

1. Vertex brown; yellow round spot on frons near dorsal margin ( Fig. 2C); tegmina with 10 yellow spots in total ( Fig. 2D). Recorded from Jianfeng Mountain, Hainan, China ………………………… ………………………………… Gergithus (Maculergithus) multipunctatus Che, Zhang & Wang, 2007

– Vertex yellow; yellow spot of frons extending to vertex, or no yellow spot on dorsal half of frons; tegmina with 8, 9 or 10 yellow spots in total ……………………………………………………2

2. Yellow spot of frons extending to vertex ( Fig. 2A, G) ………………………………………………3 – Dorsal half of frons brown without yellow spot ( Fig. 2E, I) ……………………………………4

3. Tegmina with 2 yellow spots along sutural margin and 8 yellow spots in total ( Fig. 2B). Recorded from Tam Dao N.P., Vietnam …………………… G. (Maculergithus) luteomaculatus subgen. et sp. nov.

– Tegmina with 3 yellow spots along sutural margin and 10 yellow spots in total ( Fig. 2H). Recorded from Tam Dao N.P., Vietnam …………………… …… G.(Maculergithus) tamdao subgen. et sp. nov.

4. Tegmina with 9 yellow spots in total ( Fig. 2F). Recorded from Bawangling Mountain, Hainan, China …………………………………… G. (Maculergithus) nonomaculatus Meng & Wang, 2012

– Tegmina with 10 yellow spots in total ( Fig. 2J). Recorded from Wuzhishan, Hainan, China ………… ……………………………………………………………………………… G. ( Maculergithus) sp.