For the fifth edition, the text has been updated with new information on distributions, life histories and larval food plants. The taxonomy of each species has been reviewed, and the text and relevant keys have been revised with newly published information. The text runs to 506 pages and includes an extensive bibliography and full indices. Additionally, the layout has been modernized for better readability and aesthetics while the figures have been redrawn for clarity. It includes a completely new set of 132 colour plates illustrating every species reliably recorded from Singapore and the Malay Peninsula, showing the upperside and underside of both males and females of most species. The immature stages of selected species, representing each butterfly subfamily, are illustrated in 6 colour plates. There are also 25 pages of genitalia drawings. (Zoology/Wildlife-Birds)