Abstract
Of 89 species and forms of Bryobla known for 200 year study, 41 have been recognized satisfying the modern nomenclature standards, of which 35 species and forms are registered in the U. S. S. R. The clue for determination of world fauna 39 species as well as detailed descriptions of 34 species accompanied with illustrations ate presented. 14 species of them are danger6us pests of ornamental and agricultural plants. They are found most frequently on plants of families: Compositae, Gramineae and Rosaceae.
