Synopsis of Nearctic Ichneumoninae Stenopneusticae with Particular Reference to the Northeastern Region (Hymenoptera). Part I...
By Heinrich G
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Full title is "Synopsis of Nearctic
Ichneumoninae Stenopneusticae with Particular Reference to the Northeastern Region (Hymenoptera). Part I Introduction, Key to Nearctic Genera of
Ichneumoninae Stenopneusticae, and Synopsis of the
Protichneumonini North of Mexico."