Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
[cite:516997]
although the additions of the last decades are not covered, the source provides useful, albeit rather general (by country) distribution data on each species
http://www.sel.barc.usda.gov/selhome/leafhoppers/mckpaper.htm

Link down, maybe here?