Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Interesting looking project to create a guide for Ontario's syrphids. Publication of the booklet is expected in 2006.
http://www.canacoll.org/Diptera/Staff/Skevington/Syrphidae/Syrphidae.htm

Link broken
This link takes me nowhere. Is there a new one out there somewhere?

 
Link broken...
Try this one. But, unfortunately Chrysotoxum is still one of those genera that have no additional info yet:

http://www.canacoll.org/Diptera/Staff/Skevington/Syrphidae/Syrphidae.htm

Change in title/scope
This link is now the "Field Guide to the Syrphidae of Northeastern North America." Can the description above be updated to reflect this? The following overview is from the homepage:

This project started as a small Ontario based guide following the successful field guide format of the late Ian Carmichael and his former collaborators (Photo Field Guide to the Dragonflies and Damselflies of Southwestern Ontario, Photo Field Guide to the Butterflies of Southern Ontario, and Photo Field Guide to Some Caterpillars of Southern Ontario). It has been expanded to include all of the species of Syrphidae from Northeastern North America (397 species). This web site contains samples from the original Ontario guide. We hope to complete the guide by 2014.

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to facilitate citation