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Journal Article The classification, evolution and biology of the Costa Rican species of Cryptophion (Hymenoptera: Ichneumonidae) Get access IAN D. GAULD, F.L.S., IAN D. GAULD, F.L.S. 1Department of Entomology, The Natural History Museum, London SW7 5BD Search for other works by this author on: Oxford Academic Google Scholar DANIEL H. JANZEN DANIEL H. JANZEN 2Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, U.S.A. Search for other works by this author on: Oxford Academic Google Scholar Zoological Journal of the Linnean Society, Volume 110, Issue 4, April 1994, Pages 297–324, https://doi.org/10.1111/j.1096-3642.1994.tb01477.x Published: 28 June 2008 Article history Received: 01 January 1993 Accepted: 01 May 1993 Published: 28 June 2008
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Gauld et al. (1994) studied this question.
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