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Biology of Microdon fuscipennis (Diptera: Syrphidae) with interpretations of the reproductive strategies of Microdon species...
By Duffield R.M.
Proc. Entomol. Soc. Wash. 83: 716-724, 1981
Cite: 739330 with citation markup [cite:739330]
Full title: Biology of Microdon fuscipennis (Diptera: Syrphidae) with interpretations of the reproductive strategies of Microdon found north of Mexico
Full text

Working BHL Link available
The "Full Text" link currently in the body of the "book entry" above appears to be dead (it hung when I tried it), but this paper is available on BHL at:

  https://www.biodiversitylibrary.org/page/16365065

One nice thing about BHL links is the tend to be stable over time (at least up to now ;-). Another nice thing about BHL is you can easily make a link that refers to a particular page of a paper...whereas a link to a PDF always opens the entire document starting on the 1st page.