Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae) » Maccaffertium » Maccaffertium modestum
Photo#2021280
Maccaffertium modestum? - Maccaffertium modestum
Copyright © 2021 Dave Webb

Maccaffertium modestum? - Maccaffertium modestum
Fallston, Harford County, Maryland, USA
August 12, 2021
Size: 9.5 mm
Attracted to MV lamp / blacklight set up in mowed section of utility right-of-way bordering mature deciduous forest, and approximately 100 m from stream valley. Feel comfortable calling this M. modestum, but not sure of age/sex. ID help appreciated.

Images of this individual: tag all
Maccaffertium modestum? - Maccaffertium modestum Maccaffertium modestum? - Maccaffertium modestum
Contributed by Dave Webb on 13 August, 2021 - 10:28am
Last updated 15 August, 2021 - 4:50pm

Moved
Moved from Mayflies.
… Roger Rohrbeck, 15 August, 2021 - 4:50pm

Maccaffertium modestum
Hi Dave-

Yes, I believe this female imago to be Maccaffertium modestum.
… Roger Rohrbeck, 15 August, 2021 - 4:50pm

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2025 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo