As ectotherms, the growth and development of insects is affected by temperature. Several mathematical models have been built to describe the relationship between temperature and the development rate of insects. These models can be generally divided into two categories; the first are based on thermodynamics whereas the second are not. In this paper, we comment on eleven mathematical models that attempt to describe the temperaturedependent developmental rates of insects and emphasize the advantages of the SharpeSchoolfieldIkemoto (SSI) model with reference to our previous studies. We consider this model to be the best so far developed. We illustrate the application of the various models with a published dataset of developmental rate versus temperature.