Maculergithus, a new subgenus in Gergithus Schumacher, 1915 with two new species from northern Vietnam (Hemiptera: Fulgoromorpha: Issidae) Author Constant, Jérôme 6E6072A1-9415-4C8D-8E60-2504444DB290 Royal Belgian Institute of Natural Sciences, O. D. Phylogeny and Taxonomy, Entomology, Vautier street 29, B- 1000 Brussels, Belgium. & urn: lsid: zoobank. org: author: 6 E 6072 A 1 - 9415 - 4 C 8 D- 8 E 60 - 2504444 DB 290 & Corresponding author: jerome. constant @ naturalsciences. be jerome.constant@naturalsciences.be Author Pham, Hong-Thai E34CB863-7E3B-4E8F-8738-B41C07D9F5F9 Vietnam National Museum of Nature, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Hanoi, Vietnam. & Email: phamthai @ vnmn. vast. vn & urn: lsid: zoobank. org: author: E 34 CB 863 - 7 E 3 B- 4 E 8 F- 8738 - B 41 C 07 D 9 F 5 F 9 phamthai@vnmn.vast.vn text European Journal of Taxonomy 2016 2016-05-19 198 1 16 journal article 21959 10.5852/ejt.2016.198 66bc6169-67f1-46ca-ba7d-08326ec09cf3 2118-9773 3838140 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.