Disclosed are compounds of Formula1,N-oxides, and salts thereof,wherein X is O or S Y is O or S A is O, S, NR3eor C(R3c)=C(R3d) Z is a direct bond, O, S(O)n, NR6, C(R7)2O, OC(R7)2, C(=X1), C(=X1)E, EC(=X1), C(=NOR8) or C(=NN(R6)2) a is 1, 2 or 3 and R1, R2, R3a-R3e, R4, R5, R6, R7, R8, X1and E are as defined in the disclosure.Also disclosed are compositions containing the compounds of Formula1and methods for controlling an invertebrate pest comprising contacting the invertebrate pest or its environment with a biologically effective amount of a compound or a composition of the invention.本文揭露式1化合物、其N-氧化物及其鹽類,其中X係O或S;Y係O或S;A係O、S、NR3e或C(R3c)=C(R3d);Z係一直接鍵、O、S(O)n、NR6、C(R7)2O、OC(R7)2、C(=X1)、C(=X1)E、EC(=X1)、C(=NOR8)或C(=NN(R6)2);a係1、2或3;以及R1、R2、R3a-R3e、R4、R5、R6、R7、R8、X1及E係如同本揭露中所界定。本文也揭露含有式1化合物的組合物,以及控制無脊椎動物害蟲的方法,其包含以一生物有效量的本發明化合物或組合物接觸該無脊椎動物害蟲或其環境。