The tephritid Dacus cucurbitae is reported from the Solomon Islands for the first time. Investigations on butterfly farming are reported, an area of forest having been planted with Aristolochia tagala (the food-plant of birdwing Papilionidae) and specimens of Ornithoptera priamus urvillianus and O. victoriae having been collected from the farm. Progress in establishing a collection of insects of economic importance is described. The introduced pollinating weevil Elaeidobius kamerunicus has increased fruit-set in oil palm from 47-62 to 66-78%. In connection with possible biological control of pests of vegetables in the future, 8 hymenopterous species of parasites of Homona sp., Ostrinia furnicalis, Epilachna doryca, Diaphania indica and Plusia chalcites [Chrysodeixis chalcites] in the Solomon Islands are listed. Several other candidate pests for biological control are discussed.