| Abstract: | The caddisfly fauna of the Greater Antillean island of Hispaniola, comprised of the nations of the Dominican Republic and Haiti, is reviewed in the light of large, new collections. As a result 109 named species are reported from the island, of which 86 or 80% are endemic to it. For comparison, Cuba has 90 named species, Jamaica 52, and Puerto Rico 42. Thirty-two species or subspecies are described and figured as new: Austrotinodes labiatus, Cariboptila mathisi, C. paradoxa, Helicopsyche parahageni, H. melanochaeta, H. poliochaeta, H. septifera, Atopsyche hinnulus, A. orientalis, A. peravia, A. thomasi, Streptopsyche rawlinsi, S. praecipua, Smicridea brunnescens, S. duarte, Alisotrichia bisetosa, A. woodruffi, A. ultima, Metrichia longispina, Ochrotrichia baorucoensis, O. larimar, O. obovata, O. seiba, Oxyethira geminata, O. scopulina, Oecetis haitises, Setodes anomalus, Marilia vulga, Chimarra spinulifera baoruco, Cernotina danieli, Polycentropus pedernales, and the description of Neotrichia bifurcata by Harris is also included. Oxyethira simulatrix cubana is reduced to synonymy with its nomotypical form and Marilia nigrescens is raised to full specific status. A number of unassociated females, 4 of which assuredly represent undescribed species, are mentioned. Synonymies, distributions and new collection data are provided for most species.
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