Review of the genus <i>Trichiotes</i> Casey (Coleoptera: Tenebrionidae: Pimeliinae: Edrotini), with the description of a new species and a preliminary checklist of the Tenebrionidae from Cuatrociénegas, Mexico.

The rarely collected, previously monotypic, darkling beetle genus Trichiotes is reviewed, including new state and country records for T. seriatus Casey, 1907 and a new species, Trichiotes lightfooti Wirth & Smith, n. sp., is described from the Cuatrociénegas Protected Area in Coahuila, Mexico. Differences in stridulatory structures between the species are discussed and the occurrence of a waxy, extracuticular pruinescence is reported for Trichiotes. A species key to the genus is provided and a checklist of the known Tenebrionidae from the Cuatrociénegas region is presented.