Abstract: Compounds of formula (I) in which X.sup.1 and X.sup.2 each represents oxygen; S(O).sub.n, n being 0, 1 or 2; or CO, CH.sub.2 or NR, R being hydrogen or alkyl; R.sup.1 and R.sup.10 are each hydrogen or halogen; R.sup.2 and R.sup.9 are each hydrogen, halogen, cyano, nitro, alkyl, halo-alkyl, alkoxy, alkylthio, amino, mono- or di-alkylamino, alkoxyalkyl, haloalkoxyalkyl or alkoxycarbonyl; R.sup.3 and R.sup.8 are each hydrogen, chlorine, alkyl, haloalkyl, haloalkenyl, halo-alkynyl, haloalkoxy, haloalkoxycarbenyl, haloalkylthio, haloalkoxyalkyl, haloalkylsulphinyl, or haloalkylsulphonyl, nitro or cyano; R.sup.4 and R.sup.7 are each hydrogen, halogen, alkyl or alkoxy; R.sup.5 is hydrogen, halogen, cyano, alkyl, haloalkyl, alkoxy, alkylthio, alkylsulphonyl or phenyl; and R.sup.6 is hydrogen or, when R.sup.5 is hydrogen, alkyl; provided that either each phenyl is unsubstituted or at least one of R.sup.3 and R.sup.8 is not hydrogen, have useful pesticidal activity.