Abstract
Several species of Tribolium are important primary and secondary pests of various kinds of cereal products and for this reason have long attracted the attention of entomologists. Some of the species are easily cultured in the laboratory and have therefore become favoured animals for experiments not particularly concerned with their rôle as pests. As a result of the two avenues of approach, a very impressive amount of information has now been accumulated concerning the habits and physiology of a few of the species.