Gerridae of Suriname and the Amazon with additional records of other neotropical species

The material studied was collected by Dr. P. H. van Doesburg Jr. during his stay in Surinam and by various workers during investigations sponsored by the “Max-Planck-Institut fur Limnologie, Abt. Tropenökologie” at Plon (director Prof. Dr. H. Sioli), and the “Instituto Nacional de Pesquisas da Amazonia” at Manaus and Brasilia (director Prof. Dr. D. Batista). Additional material from the Rijksmuseum van Natuurlijke Historie at Leiden, collected by various persons was also studied. Specimens have been deposited in the collection of the I.N.P.A., Manaus (A), the collection of the Koninlijk Belgisch Instituut voor Natuurwetenschappen, Brussels (B), the Rijksmuseum van Natuurlijke Historie, Leiden (L) and the Zoologisch Museum, Utrecht (U); some are in the collection of the author.