Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
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Fall Fund Drive


Superfamily Heptagenioidea

Small  Big-headed Mayfly - Arthroplea bipunctata Mayfly Larva - Arthroplea bipunctata Mayfly Larva - Arthroplea bipunctata Mayfly - Arthroplea bipunctata - female Mayfly - Arthroplea bipunctata big-eyed mayfly - Arthroplea bipunctata - male big-eyed mayfly - Arthroplea bipunctata - male Mayfly - Arthroplea bipunctata - female

mayfly - Stenacron interpunctatum Epeoris vitrius - Epeorus Rhithrogena impersonata red variant - Rhithrogena impersonata mayfly - Leucrocuta - female Mayfly - Stenonema femoratum Epeorus albertae - voucher specimen, in alcohol - Epeorus albertae flat-headed mayfly - Leucrocuta - male Mayfly - Leucrocuta - male

Brushlegged Mayfly Nymph - Isonychia Mayfly (? species) - Isonychia sicca Mayfly - Isonychia velma Mayfly - Isonychia Isonychiidae, genus Isonychia - Isonychia Mayfly - Isonychia - male brown mayfly - Isonychia Isonychia velma - voucher specimen, in alcohol - Isonychia velma

Homoeoneuria homoeoneuria - Homoeoneuria Homoeoneuria exoskeleton

Pseudiron centralis Pseudiron centralis