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Review of the wasps of the subfamily Pseninae of North America (Hymenoptera: Aculeata)
By Malloch, J.R.
Proceedings of the United States National Museum. 82 (2967):1–60, 1933
Cite: 1662580 with citation markup [cite:1662580]
full text
The 2 plates are found between pages 16 and 17 as numbered in the paper