The fourth instar larva and pupa of Serangium xinpingensis sp. nov. a fourth instar larva, dorsal view b fourth instar larva, lateral view c pupa, dorsal view d–j larval structures: d head capsule, dorsal view e antenna, dorsal view f labrum. dorsal view g mandible, dorsal view h tibiotarsus and claw. dorsal view i maxillary mala, ventral view j mouthparts, ventral view. Scale bars: 1 mm (a–c); 0.05 mm (d–f, h–j); 0.025 mm (g).