The author examines two specimens of Nicoletia texensis Ulrich from the Quintero caves, Tamaulipas (Mexico). Among the most important characteristics of this species the exaggerated lengthening of the legs, cerci, antennae and other appendages has to be mentioned. Among Diplura, nearly the same degree of lengthening of the appendages may be observed in Plusiocampa dargilani (Moniez), a troglobitic Campodeidae of France. The structure of the median claw, completely different form other Nicoletia, probably will allow the institution of a new Genus for N. texensis.