Most of the material recorded in this paper was collected by the author during his stay in Suriname from 1949 to 1955. By courtesy of Mrs. J. BONNE-WEPSTER, the author was enabled to study the Wyeomyia specimens which were collected by BONNE and BONNE-WEPSTER in Suriname and are at present in the collection of the Department of Tropical Hygiene and Geographical Pathology of the Royal Tropical Institute, Amsterdam. This material includes five holotypes and a number of paratypes.