Fifty-two species of phototactic Tenebrionidae are recorded from Lambir Hills National Park and the secondary forests surrounding the park. One new genus and twelve new species are described under the following names: Anognathena gen. nov., Anognathena neraida sp. nov., Amarygmus hansbremeri sp. nov., Cleomis purpuricollis sp. nov., Cryphaeus irregularis sp. nov., Euhemicera hutanicola sp. nov., Hemicera (Hemicera) vittigera sp. nov., Hemicera (Hemicera) parca sp. nov., Pseudonautes viridinitidus sp. nov., Psydus virgulatus sp. nov., Uloma (Uloma) nyctelia sp. nov., Uloma (Uloma) sarawakensis sp. nov. and Uloma (Uloma) serripunctata sp. nov.