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Published online by Cambridge University Press: 31 May 2012
The Nearctic species of the genus Atrometus Foerster (Hymenoptera: Ichneumonidae) north of Mexico are revised. Three previously recognized Nearctic species, A. praediscae, A. clavipes, and A. evetrivorus, are synonymized with A. geniculatus Holmgren from the Palearctic Region. A new species A. badius and a new subspecies A. geniculatus obscurus are described. A key is presented for the separation of the species and subspecies.