Adults of Diduga spp. 1 D. simianshana sp. nov., male, holotype, China (Chongqing) 2 dittos, female, paratype, China (Chongqing) 3 D. nigridentata, male (after Bayarsaikhan and Bae 2019) 4 D. quinquicornuta, male (after Bayarsaikhan and Bae 2019) 5 D. chebalinga sp. nov., male, holotype, China (Guangdong) 6 ditto, female, paratype, China (Guangdong). CB: costal band; IE: inner edge of costal band; TB: terminal band.