中文摘要：

本文记述毛绥螨属Lasioseius一新种囊毛绥螨Lasioseius scrotiformis Jiang＆Jin,sp.nov.,近似种为亚东毛绥螨Lasioseius yadongensis Ma＆Wang,二者区别在于新种背板前部具囊泡状网纹,背表皮毛10对均为刀状,无胸前板,生殖板两侧具孔缘1对;而亚东毛绥螨背板前部无囊泡状网纹,无背表皮毛,具2对胸前板,生殖板两侧无孔缘。模式标本保存于贵州大学昆虫研究所（GUGC）。文中编制了含本文记述新种在内的中国已知25种的分类检索表。

英文摘要：

The diagnosis of the genus Lasioseius is given in this paper. A new species,L. scrotiformis sp. nov.Jiang Jin,is described and illustrated,collected from Guizhou Province,China. The new species is similar to L. yadongensis Ma Wang but can be easily separated by the following characters： Anterior podonotal shield colliculate- reticulate,10 pairs of setae in soft cuticle laterad shield,without presternal plate,on both sides of genital plate with 1 pore; while in L. yadongensis Ma Wang,Anterior podonotal shield fish scale- shaped,without seta in soft cuticle laterad shield,with 2 pairs of presternal plates,on both sides of genital plate without pore. The type specimen is deposited in Institute of Entomology,Guizhou University,P. R.China（ GUGC）. An updated key is given to 25 species of the genus known in China at present.