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Mr Johnston's Annotated Catalogue of African Grasshoppers (Cambridge, 1956) presented a complete list of all species recorded from Africa up to the end of 1953. A bibliography of almost 1000 titles was used and summaries after each species gave full references to published descriptions, synonyms, figures and data on distribution, ecology, habits and economic importance. This Supplement continues the index up to the end of 1965, and also includes a few important papers published early in 1966. Since 1953, acridologists have paid considerable attention to the African fauna, and 416 new species and subspecies have been described. The control of pests such as grasshoppers and locusts is closely related to their biology, and so research must be based on a knowledge of taxonomy and systematics. Like the original Catalogue, the Supplement will be a fantastic work of reference for acridologists throughout the world.