This guide provides the user with the means to identify adults and nymphs of over 700 known species of Australian grasshoppers in two families (Pyrgomorphidae and Acrididae) using equipment no more technical than a 10x hand lens. Easy-to-understand diagrams illustrate the morphological structures necessary to make determinations and technical terms are kept to a minimum. The introduction provides details on grasshopper habits, biology, habitats, collecting, rearing, preserving as well as an illustrated key to the major groups. Includes photographs of the grasshoppers in nature and characteristic structural features, concise notes on habitats and related species, literature references when available, and distribution maps. A classification scheme will prove useful in arranging collections and understanding the relationships of species to one another.