The data concerning the heteropterous fauna of the Netherlands Antilles from which the following series of contributions has been compiled are chiefly the result of an entomological study trip lasting from September 1956 until July 1957. The investigations were carried out under the auspices of, and sponsored by, the Natuurwetenschappelijke Studiekring voor Suriname en de Nederlandse Antillen (Foundation for Scientific Research in Surinam and the Netherlands Antilles), with financial assistance from the Government of the Netherlands Antilles. I wish to express my appreciation to the Foundation for making it possible for me to undertake this mission.