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Published online by Cambridge University Press: 31 May 2012
Five new species of Pison, subgenus Krombeiniellum, are described: stangei from Argentina; duckei, plaumanni, and neotropicum from Brazil; and krombeini from Central America. Pison duckei, plaumanni, and neotropicum are known by females only. A key is provided for the identification of the New World Krombeiniellum; the subgenus is divided into three species groups.