I.Biology of Locusts 1.Ontogeny(个体发育) Locusts are paurometabola in hemimetabolous. Ontogeny includes 3 stages of egg,nymph and adult. Nymph called 蝻in Chinese. 1. Ontogeny (个体发育) ¾ Locusts are paurometabola in hemimetabolous. ¾ Ontogeny includes 3 stages of egg, nymph and adult. ¾ Nymph called 蝻 in Chinese. Ⅰ.Biology of Locusts Biology of Locusts