Taxonomic Study on the Genus Gergithoides Schumacher (Homoptera: Fulgoroidea: Issidae)

The present paper deals with four species of the genus Gergithoides Schumacher, of which two are new to science, i. e. , Gergithoides undulates Wang et Che, sp. nov. and Gergithoides gibbosus Chou et Wang, sp. nov. New species are described and illustrated. A key to all species of this genus is proposed. The type specimens are despoisted in the Entomological Museum, Northwest Sci-Tech University of Agriculture and Forestry. 1. Gergithoides carinati frons Schumacher Specimens examined: 1♂ 2♀♀, Jianfeng Mountain, Hainan Province, 14-Ⅻ-1974, coll. Yang Chikun; 1♂, Jianfeng Mountain, Hainan Province, 30-Ⅻ-1981, coll. Liu Yuanfu; 1♀, Jianfeng Mountain, Hainan Province, 22-Ⅶ-1982, coll. Liu Yuanfu. 2. Gerithoides rugulosus Melichar Specimens examined: 1♂, Wuyi Mountain, Fujian Province, 30-Ⅶ-1984, coll. Cui Zhixin; 1♂, Sangang, Fujian Province, 02-Ⅹ-1981, coll. Jiang Fan; 1♀, Darning Mountain, Wuming, Guangxi Zhuang Autonomous Region, 24-Ⅴ-1963, coll. Yang Chikun; 1♀, Qingcheng Moutain, Sichuan Province, 12-Ⅷ-1957, coll. Zheng Leyi ;1♀, Guantai, Qiubei, Yunnan Province, 27-Ⅵ-1979, coll. Liao Qiyu. 3. Gergithoides undulatus Wang et Che, sp. nov. (Figs. 1～6) Length (incl. Teg.): ♂6.0 mm, ♀6.2 mm; Tegmen: ♂4.6 mm, ♀4.9mm. This species is similar to G. rugulosus, but can be separated from the latter by: 1) legs yellow brown, coxa and the base of femora of fore and middle legs black, hind femora black, but in the latter, coxa dirty green, femora with brown stripes; 2) tegmen without mark, but in the latter with white mark; 3) in dorsal view, the shape of anal segment likes the head of a wolf, lateroapical angles obviously rise, but in the latter, apical margin straight, the shape likes a cup. Holotype ♂, Xiandi, Rong county, Guangxi Zhuang Autonomous Region, 08-Ⅶ-1981, coll. Luo Guibiao. Paratypes 1 ♀, Jianfeng Mountain, Hainan Province, 1412 m, 27-Ⅶ-1983, coll. He Jianli; 1 ♀, Jianfeng Mountain, Hainan Province, 01-Ⅷ-1983, coll. Hua Lizhong; 1 ♀ , Jianfeng Mountain, Hainan Province, 26-Ⅱ-1982, coll. Chen Zhenyao; 1 ♀, Jianfeng Mountain, Hainan Province, 24-Ⅺ-1981, coll. He Chongbin; 2 ♀♀, same locality, date and collector as holotype; 1 ♀, Dali, Putuo, Yulin, Guangxi Zhuang Autonomous Region, 31-Ⅶ-1980, coll. He Yandong; 2 ♀♀, Jianfeng Mountain, Hainan Province, 23-Ⅹ-1981,20-Ⅵ-1981, coll. Gu Maobin; 1 ♀, Jianfeng Mountain, Hainan Province, 24-Ⅻ-1981, coll. Liu Yuanfu. 4. Gergithoides gibbosus Chou et Wang, sp. nov. (Figs. 7～13) Length (incl. Teg.): ♂5.5 mm,♀6.0 mm; Tegmen: ♂4.4 mm, ♀5.1 mm. This species resembles G. carinatifrons, but can be distinguished from the latter: 1) tegmen pale brown with black mark, but in the latter dark brown with pale yellow mark; 2) in dorsal view, the shape of anal segment likes the head of a bear, lateroapical angles obviously rise, but in the latter, apical margin shallowly rise; 3) aedeagus with W-shaped processes, but in the latter with S-shaped processes. Holotype ♂, Jianfeng Mountain, Hainan Province, 28-Ⅷ-1982, coll. Liu Yuanfu. Paratypes 2 ♂♂, Jianfeng Mountain, Hainan Province, 27-Ⅳ-1982, 27-Ⅴ-1982, coll. Gu Maobin; 1 ♂ Jianfeng Mountain, Hainan Province, 27 -Ⅶ-1983, coll. Hua Lizhong; 1 ♂, Jianfeng Mountain, Hainan Province, 27-Ⅱ-1982, coll. Chen Zhenyao; 2♀♀, Jianfeng Mountain, Hainan Province, 28-Ⅷ-1982, 27-Ⅳ-1982, coll. Liu Yuanfu; 1 ♀, Jianfeng Mountain, Hainan Province, 07-Ⅷ-1981, coll. Liu Yuanfu.