Abstract
Four species of the genus Trichrysis Lichtenstein, 1876 are described from Vietnam as new for science: T. aliciae Wiśniowski, sp. nov., T. chamchuensis Wiśniowski & Nguyen, sp. nov., T. kylan Wiśniowski & Cuong, sp. nov., and T. raymundi Wiśniowski, sp. nov. The species belong to the T. cyanea species group.
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