西藏拟无声蝗属一新种(直翅目,网翅蝗科)

ONE NEW SPECIES OF THE GENUS PSEUDOASONUS YIN FROMXIZANG (ORTHOPTERA, ARCYPTERIDAE)

记述采自西藏拉萨河地区拟无声蝗属1新种,直缘拟无声蝗 Pseudoasonus orthomarginis sp. nov.。新种近似于白玉拟无声蝗Pseudoasonus baiyueusis Zheng,1990。主要区别为:1)前胸背板沟前区长为沟后区长的1.75倍;2)前翅顶端尖锐;3)雌性中胸腹板侧叶间中隔宽为长的2.5倍;4)前胸背板后横沟不切断中侧隆线。附有拟无声蝗属分种检索表。新种的模式标本保存于陕西师范大学动物研究所昆虫标本室。

In the present paper, one new species of the genus Pseudoasonus Yin is described. Type specimens are kept in the Institute of Zoology, Shaanxi Normal University. Pseudoasonus orthomarginis sp. nov. （Figs 1-4） This new species is allied to Pseudoasonus baiyuensis Zheng, 1990, but differs in： 1） length of prozona of pronotum 1.75 times as the length of metazona; 2） apex of tegmina sharp; 3） width of interspace of mesosternum of female 2.5 times as its length; 4） median and lateral carinae of pronotum not crossed by hind sulcus. ♀ Length of body 14.0-18.0 mm. Length of pronotum 2.2-3.0 mm. Length of tegmina 1.0-2.2 mm. Length of hind femur 7.5-10.5 mm. Holotype ♀, Xizang, Mozhugongca （27°8′N, 91°6′E）, 2 Aug. 2004, collected by CHEN Zhen-Ning. Paratype 1♀, same data as holotype. Etymology. The specific name is derived from the Greece ＂orth＂ and ＂margin＂.