The invention relates inter alia to halogen-substituted compounds of the general formula (I)in which the radicals A1-A4, T, n, W, Q, R1 and Z1-Z3 have the meanings given in the description. Also described are processes for preparing the compounds of the formula (I). The compounds according to the invention are particularly suitable for controlling insects, arachnids and nematodes in agriculture and ectoparasites in veterinary medicine.本發明尤其關於式(I)之經鹵基取代的化合物其中A1-A4、T、n、W、Q、R1和Z1-Z3具有發明之說明中所示的意義。本發明亦說明製備式(I)化合物的方法。根據本發明的化合物尤其適用於農業上對昆蟲綱、蛛形綱和線蟲綱動物以及在獸醫學上對皮外寄生蟲的防治。