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Upcoming Events

Interested in a 2022 BugGuide gathering in New Mexico?

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Previous events


Species Stenonema femoratum

Mayfly - Stenonema femoratum - male Mayfly - Stenonema femoratum Backyard Mayfly - Stenonema femoratum mayfly in forest - Stenonema femoratum - male Mayfly? - Stenonema femoratum Heptageniidae, Stenonema femoratum or Stenacron sp. - Stenonema femoratum Ephemeropteran - Stenonema femoratum Heptageniidae mayfly nymph? - Stenonema femoratum
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Superfamily Heptagenioidea
Family Heptageniidae (Flatheaded Mayflies)
Genus Stenonema
Species femoratum (Stenonema femoratum)
Explanation of Names
Stenonema femoratum (Say 1823)
The distinctive traits are tightly clustered crossveins near the bulla of the forewing in combination with three dark marks along the posterior edges of the terga. -- Lloyd Gonzales
Canada, e. US(1) map(2)