The present paper deals with the results of my investigations regarding the tenebrionid beetles of the Antilles, north of Trinidad. For this work, use has been made of the magnificent collections assembled by Dr. P. WAGENAAR HUMMELINCK, of a number of specimens gathered by Dr. H. J. MAC GILLAVRY as a student member of a geological excursion to Cuba that took place in 1933 under the direction of Prof. L. M. R. RUTTEN, and also of materials belonging to several European museums. In particular, I have examined specimens in the British Museum (N.H.); the Natural History Museum at Paris; the Natural History Museum of Amsterdam; the State Museum of Zoology, Munich; the G. Frey Entomological Museum, Munich; and lastly the Museum of Zoology of the University of Turin. I wish to express my gratitude to all those people who have made the work possible by lending me the materials mentioned above. I also wish to thank Professor R. MALARODA, Director of the Institute of Geology of the University of Turin, for his useful criticism of my geological considerations.