The automated insect separation system processes an aggregate mixture of insects and other materials so that selected insects are separated from the other components of the mix. Specifically, the aggregate mix is directed into a separator apparatus so that the mix flows vertically through a series of vibrating screens. In the preferred embodiment, the screening process separates two different sizes of mealworm larvae from the aggregate mixture. The mix includes the mealworm larvae, unconsumed food materials (usually wheat bran), and insect frass.