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The Eutrichosomatinae are reclassified as a subfamily of the Pteromalidae and keys are given to the three genera and five species now included. Descriptions are given of Eutrichosoma Ashmead with two species, mirabile Ashmead [= albipes Crawford syn. n. ] and flabellatum sp. n. , in North and South America; Peckianus gen. n. with type‐species Perilampus laevis Provancher in North and South America; and Collessina gen. n. with type‐species C.pachyneura sp. n. in Australia.
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Z. Bouček (1975) studied this question.
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