The nomenclatural status of Trogoderma yunnaeunsis Zhang and Liu is clarified. T. yunnaneunsis Zhang, Liu, and Jing is found to be a junior synonym of T. yunnaeunsis. The adult is distinguished from 7 different eastern Palearctic species of Trogoderma and from the European T. versicolor (Creutzer). The mature larva of T. yunnaeunsis is described and distinguished from larvae of other Eastern Palearctic Trogoderma for which information is available.