Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Townes, H., and M. Townes. 1960. Ichneumon-flies of America north of Mexico. 2. Subfamilies Ephialtinae, Xoridinae, Acaenitinae. United States National Museum, Bulletin 216 (Part 2). vii + 676 p.
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