Having terminated his term of office as a Director of the Suriname Museum at Paramaribo, Dr. D. C. GEIJSKES returned to Holland. Accompanied by Mrs. GEIJSKES he availed himself of the opportunity to make a collecting-trip to several islands of the Windward Group of the Lesser Antilles, situated in a curved line between Trinidad and Puerto Rico. The islands of Grenada, Barbados, St. Vincent, St. Lucia, Martinique, Dominica, Guadeloupe, Antigua, Barbuda, Montserrat, St. Kitts, St. Eustatius, St. Martin, Saba and Anguilla were visited in succession. Though Dr. GEIJSKES himself is especially interested in Odonata and aquatic Neuroptera, he and Mrs. GEIJSKES have been kind enough to catch also the Syrphidae they came across. In total 170 Syrphid flies were taken representing 13 species. The flies are in very good condition with full data.