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The taxonomy of the American doryctine genus Callihormius is revised. Four Nearctic species are redescribed, including the type species of the genus (C. bifasciatus Ashmead, 1900, C. stigmatus Marsh, 1966, C. texanus Marsh, 1966 and C. werneri Marsh, 1966). Four Neotropical species are also described: C. circumlitoris sp. nov., C. franciscomartoi sp. nov., C. palagannensis sp. nov. and C. tayronensis...
Four new species of the doryctine genus Rhaconotus Ruthe from Mexico and Brazil, Rh. brasiliensis sp. nov., Rh. colegiomadridi sp. nov., Rh. republicanus sp. nov. and Rh. sabinae sp. nov., are described and illustrated. A key to ten species of Rhaconotus known for the American continent south of the USA is provided.
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