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Whitworth Terry L.  2003.  A key to the puparia of 27 species of North American Protocalliphora Hough (Diptera: Calliphoridae) from bird nests and two new puparial descriptions.  Proceedings Entomological Society of Washington, 105(4), pp.995-1033.

Whitworth Terry L. 2006. Keys to the genera and species of blow flies (Diptera: Calliphordae) of America north of Mexico. Proceedings Entomological Society of Washington 108(3): pp.689-725.  Click here for Spanish language version.
Tips For Using The Keys More Effectively And Errata
Tips For Using The Keys More Effectively And Errata (Spanish language version)

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