This contribution may be considered as an Appendix to my paper on “Tenebrionid Beetles of Curaçao, Aruba, Bonaire, and the Venezuelan Islands”, which was published in the fifth volume of this series (1954). The addition has proved to be justified after study of: 1. a collection of Tenebrionids gathered by Dr. H. J. MAC GILLAVRY, Professor of Geology at Amsterdam University, as a student member of an excursion that took place in 1930 under the direction of the late Prof. L. M. R. RUTTEN; 2. some additional material collected by Dr. P. WAGENAAR HUMMELINCK; 3. specimens from the collection of Ir. R. H. COBBEN, entomologist and agriculturist of Wageningen, in 1957; 4. material collected by B. DE JONG, biologist at Curaçao, and other sources.