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Mayfly Species Neoleptophlebia mollis (Jenny Spinner)

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This species often emerges together with Paraleptophlebia strigula and Paraleptophlebia guttata, and the combined effect can be a good fishable hatch. The latter two are much less famous than mollis, but Knopp and Cormier say they are more reliable.  

Where & When

Regions: East, Midwest

Time Of Year (?): Late May through August; best in June

This species begins to emerge soon after Paraleptophlebia adoptiva has finished.

Hatching Behavior

Time Of Day (?): Late morning to midday

The duns ride the surface for a long time before flying away. The Leonards report in Mayflies of Michigan Trout Streams that trout feed heavily on Paraleptophlebia mollis duns.

Spinner Behavior

Time Of Day: Late afternoon

The male spinners have a unique look: most of their abdominal segments are white.

Nymph Biology

Current Speed: Slow

Environmental Tolerance: Tolerant of warm water

Pictures of 1 Mayfly Specimen in the Species Neoleptophlebia mollis:

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