Synopsis Entomology is the branch of science concerned with the study of insects. Insects are small air-breathing Arthropoda of the class Insecta, having a body divided into head, thorax, and abdomen, three pairs of legs, and (in most species) two pairs of wings. Insects comprise about five sixths of all known animal species, with a total of over one million named species. This Encyclopaedic work on entomology covers all important issues pertaining to subject in simple language. Supported by facts and figures, this work will prove of utmost use to readers.