large white: Old World form of cabbage butterfly
lepidopterous insect: insect that in the adult state has four wings more or less covered with tiny scales
starch: a complex carbohydrate found chiefly in seeds, fruits, tubers, roots and stem pith of plants, notably in corn, potatoes, wheat, and rice; an important foodstuff and used otherwise especially in adhesives and as fillers and stiffeners for paper and textiles