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Published online by Cambridge University Press: 31 May 2012
The species discussed below have been received from the United States National Museum, the American Museum of Natural History, Cambridge Museum of Comparative Zoology, Cornell University, Michigan State College, British Museum of Natural History, and Deutsches Entomologisches Institute, or are in the Snow Entomological Collection at the University of Kansas. The writer is very grateful to these institutions for the privilege of studying this material. These species will be keyed and figured in a forthcoming revision of the New World Plecia.
* The preceding part of this study was published in 1940 (Jour. Kansas Ent. Soc., XIII, 15-27).