The invention relates to novel compounds of the formula (I) in which the R1, R2a, R2b, R3, A1, A2, A4 and n have the meanings given above, to their usee as acaricides and/or insecticides for controlling animal pests and to processes and intermediates for their preparation.本發明關於新穎的式(I)化合物其中R1、R2a、R2b、R3、A1、A2、A4和n具有上文所給出之意義,關於其作為控制動物害蟲的殺蟎劑及/或殺昆蟲劑之用途、及其製備方法和中間物。