广西的短柄大蚊三新种(双翅目:大蚊科)

Three New Species of Crane Flies from Guangxi(Diptent: Tipulidae)

双翅目的大蚊科(Tipulidae)属种繁多,而短柄大蚊属(Nephrotoma)又是常见的大属,体多中型,胸背黄色有3条褐色纵斑,翅透明具明显的翅痣,径分脉(Rs)很短为简易识别特征。幼虫记载为害麦类、亚麻、甜菜、蔬菜及针叶树苗等地下部分,常为重要的农业害虫。

This report deals with three species of Nephrotoma Meigen from Guangxi, all are new to science. The types are kept in the Insect Collections of Beijing Agricultural University. 1.Nephrotoma guangxiensis Yang et Yang, sp. nov.(fig.1) Simiar to N. aurantiocincta Alexander, but head and thorax browish covered with greyish powder, wings brownish. Holotype ♂, Guangxi: Tianlin Co., 1500m. 1982—Ⅴ—31, Li Fasheng. 2. Nephrotoma tianlinensis Yang et Yang, sp. nov. (fig.2) Body length 11 mm, forewing length 12mm. Head yellow without occipital marking. Antennae brown with scape yellow and pedicel brownish yellow. Similar to N. gamma(Brunetti), but pronotum yellow throughout. Holotype ♂, Guangxi: Tianlin Co., 1982—Ⅴ—28, Yang Ch(?)kun. 3. Nephrotoma jinxiuensis Yang et Yang, sp. nov. Body length 15mm, forewing length 12mm. Head yellow, but ventrally brown. Its rostrum also brown. Thorax brown. Similar to Naurantiocincta Alexander, but mainly different from the latter in head pattern. Holotype ♂, Guangxi: Jinxiu Co., 720m, 1982—Ⅵ—10, Li Fasheng.