Abstract:

The paper presents one new species of the genus Coccidencyrtus Ashmead, I.e. Coccidencyrtus longiclavatus Xu sp. Nov. collected from Shangdong, Jiangsu, Zhejiang, Fujian in China. A key for three species of Coccidencyrtus Ashmead from China is given in this paper. One new species of the genus Mayrencyrtus Hincks are presented in this paper, I.e. Mayrencyrtus longiscapus Xu sp. Nov. collected from Shanxi, Shaanxi in China. All specimens are deposited in the Institute of Applied Entomology, College of Agriculture & Biotechnology, Zhejiang University. Coccidencyrtus longiclavatus Xu, sp. Nov. Host: Quadraspidiotus pernisiosus on pear tree, Lopholeucaspis japonica on Citrus, Diaspids on walnut tree. Distribution: Shangdong (Tai'an), Jiangsu (Donghai), Zhejiang (Linhai), Fujian (Jianning). This species is similar with Coccidencyrtus exiguus Noyes et Ren, and Coccidencyrtus mandibularis Hayat, Alam et Agarwal 1975, but can be distinguished from the latter by 1) antennal scape 4.6 times as long as wide, 2) the first-fifth funicle segments subquadrate, 3) clava as long as funicle and half pedicel combined, with truncated apex. Mayrencyrtus longiscapus Xu sp. Nov. Host: Eulecanium gigantea, Drosicha contrahens. Distribution: Shanxi (Taiyuan), Shaanxi (Yangling) . This species is similar with Mayrencyrtus japonicus Tachikawa, but can be distinguished from the latter by 1) body length 1.71 mm,the latter with its body length 0.8～0.9 mm,2) antennal seape 5.7 times as long as wide,the latter with scape 2～3 times as long as wide,3) mandible with 2 denticles,the latter with its mandible 3 denticles.

Key words: scale insect, parasitoid, Encyrtidae, fruit tree, China