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Unknown Mayfly - Maccaffertium - male

Unknown Mayfly - Maccaffertium - Male
New River at Cox's Chapel Bridge, Bridle Creek Road, Grayson County, VA, Grayson County, Virginia, USA
Size: 7mm
The upper image is the imago, photographed on 9/13/17. The lower image of the same individual is the subimago, photographed on 9/13/17.

Moved from Mayflies.

Hi Robert-

I believe these combined female imago and female subimago images of the same individual to be of genus Maccaffertium.

Moved from ID Request.

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