Abstract
In this paper, four species of the genus Diduga Moore, [1887] from China (Chongqing and Guangdong) and Malaysia (Borneo, Sabah) are described as new to science, namely D. simianshana sp. nov., D. chebalinga sp. nov., D. chewi sp. nov., and D. hollowayi sp. nov. Adults of these species are illustrated in color, and images of the male and female genitalia are provided. A distribution map of the new species is provided, together with an updated checklist of all species of Diduga.