Five new species of longhorned beetles (Coleoptera: Cerambycidae) from the Dominican Republic are diagnosed, described, and illustrated: Ataxia hovorei, Atimiola rickstanleyi, Drycothaea indistincta, Eburia pseudostigma, and Hormathus giesberti. In addition, Hormathus Gahan 1890 is transferred from Tillomorphini Lacordaire into Ibidionini Thomson, Division V; Trinoplon Zayas 1975 is a new synonym of Hormathus; and Hormathus bicolor (Zayas 1975) is a new combination. A key to the three species of Hormathus is provided. This study joins Lingafelter and Woodley (2007) as the second in a series of papers that will document and describe the diverse longhorned beetle fauna of the Dominican Republic. These papers will serve as a foundation for a proposed Field Guide of Longhorned Beetles of the Dominican Republic. In this paper we describe five species of Cerambycidae collected there during our expeditions from 2004-2006. The Dominican Republic, with its varied habitats including both the highest and lowest points in the Caribbean, contains a high diversity of insects as revealed through many recent collecting expeditions. Jim Wappes and Edmund Giesbert made intensive expeditions there in the mid-1980s. Paul Skelley, Bob Woodruff, and Fred Skillman collected intensively around the Filipinas Larimar mine on the Barahona Peninsula in the early 1990s. Teams of students and researchers from Carnegie Museum (led by J. Rawlins and R. Davidson), Harvard University (led by B. Farrell), Florida State Collection of Arthropods (led by M. Thomas), and United States Department of Agriculture (USDA)-Smithsonian (led by S. Lingafelter) have collected thousands of specimens of phytophagous beetles recently. Together with these groups, graduate students from University of New Mexico (E. Nearns), University of Minnesota (L. Chamorro-Lacayo), and University of Maryland (C. Micheli) have made important collections. Add to