NOVELTY - Substituted 4-cyano-3-benzoylamino-N-phenyl-benzamide compounds (I) are new.    USE - (I) are useful in controlling insects, acarines, nematodes or mollusks in pest, a locus of a pest, or in a plant susceptible to attack by a pest (claimed). (I) are useful to control: infestations of insect pests e.g. lepidoptera, diptera, hemiptera, thysanoptera and orthoptera; invertebrate pests e.g. acarine, nematode and mollusc pests; and pest species e.g. Aphis gossypii, Aphis fabae, Lygus spp., Dysdercus spp. and Nilaparvata lugens, where the pests associated with agriculture, horticulture and animal husbandry, companion animals, forestry and storage of products of vegetable origin (e.g. fruit, grain and timber).    ADVANTAGE - (I) exhibits synergistic effect and provides improved insecticidal properties comprising improved efficacy, improved selectivity, lower tendency to generate resistance or activity against a broader range of pests. (I) provides more efficient delivery and retention at sites of action, or may be more readily biodegradable.    DETAILED DESCRIPTION - Substituted 4-cyano-3-benzoylamino-N-phenyl-benzamide compounds of formula (I) and their salts or N-oxides are new.    R1, R2 = H, 1-8C alkyl, 1-8C alkylcarbonyl or 1-8C alkoxycarbonyl;    R3 = halo;    n = 0-3;    Q2 = substituted phenyl moiety of formula (II);    Y1, Y5 = halo, CN, 1-4C (halo)alkyl, 1-4C (halo)alkoxy, 1-4C alkoxy-1-4C alkyl, 1-3C (halo)alkylthio, 1-3C (halo)alkylsulfinyl or 1-3C (halo)alkylsulfonyl;    Y3 = 2-6C perfluoroalkyl, 2-6C perfluorocycloalkyl, hydroxy-2-6C perfluoroalkyl, 1-4C alkylcarbonyloxy-2-6C perfluoroalkyl, 1-4C haloalkylcarbonyloxy-2-6C perfluoroalkyl, 1-6C perfluoroalkylthio, 1-6C perfluoroalkylsulfinyl, 1-6C perfluoroalkylsulfonyl, arylcarbonyloxy-2-6C perfluoroalkyl or arylcarbonyloxy-2-6C perfluoroalkyl (in which the aryl is optionally substituted by 1-5 R4 groups);    Y2, Y4 = H, halo or 1-4C alkyl; and    R4 = halo, CN, NO2, 1-4C (halo)alkyl or 1-4C (halo)alkoxy.    An INDEPENDENT CLAIM is also included for an insecticidal, acaricidal, nematicidal or molluscicidal composition comprising (I) together with diluent or carrier.