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American Stoneflies
http://www.mc.edu/campus/users/stark/american.html
Notes and images for each of the nine families of Stoneflies occur in North America.
North American Stonefly List
http://www.mc.edu/campus/users/stark/Sfly0102.htm
List of 628 species and in which states and provinces they occur.
Plecoptera
http://tolweb.org/tree?group=Plecoptera&contgroup=Neoptera
Characteristics and phylogeny of stoneflies, from the Tree of Life project.
Plecoptera Images
http://tolweb.org/tree/eukaryotes/animals/arthropoda/hexapoda/plecoptera/slideshows/index.htm
Over 60 images of stoneflies.
Stoneflies of the United States
http://www.npwrc.usgs.gov/resource/distr/insects/sfly/sflyusa.htm
Information on hundreds of species, including distribution maps and county checklists.