"Blow flies (Diptera; Calliphoridae) of eastern Canada with a key to Calliphoridae subfamilies and genera of eastern North America, and a key to the eastern Canadian species of Calliphorinae, Luciliinae and Chrysomyiinae"
An interactive regional key, full of color glossy photographs with circles and arrows and a paragraph on the back of each one explaining what each one was.
Keys to the Genera and Species of Blow Flies (Diptera:Calliphoridae) of America North of Mexico - Terry Whitworth
This is a link to a pdf file of Dr. Terry Whitworth's paper on Calliphoridae that appeared in the Proceedings of the Entomological Society of Washington in June of 2006. The key has many beautifully detailed illustrations and there is also a simple key that will allow one to discriminate calliphorids from other similar Diptera. I emailed him in January 2008 and he generously agreed to share this paper from his web site link (www.birdblowfly.com).
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