Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera)
Kondratieff B.C., ed. (2000-) Mayflies of the United States
[cite:889604]

Distribution maps are extremely helpful, although limited to the conterminous United States
http://www.npwrc.usgs.gov/resource/distr/insects/mfly/index.htm
Contributed by v belov on 1 February, 2014 - 3:54pm

site's gone AWOL
not found at this URL or by Google search
… Steve Scholnick, 7 November, 2016 - 9:54pm

 
usgs dropped support for many precious web resources
… v belov, 7 November, 2016 - 10:16pm

 
fortunately,
we have the Wayback Machine
https://web.archive.org/web/20011116095118/http://www.npwrc.usgs.gov:80/resource/distr/insects/mfly/mflyusa.htm
… Steve Scholnick, 23 September, 2018 - 6:13pm

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