The variation of development rates among individuals in a population is one of the basic characteristics of insect development.This paper oriefly reviews some of the approaches to the modelling of distributions of insect development time, introduces the "same-shape property"conccpt first put forward by Sharpe et al.(1977), and then presents a case study in utilizing the same-shape property to simulate the distributions of insect development time, using data obtained with Myzus persicae and Lipaphis erysimi....