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Female Penelomax septentrionalis Mayfly Dun Pictures

 I'm confident this dun belongs to septentrionalis, because her legs are just too long for any other Ephemerellid, and her unusual mid-dorsal (Dorsal: Top.) stripe matches those of two easily identified nymphs I collected some miles downstream.

This really pretty mayfly was in kind of bad shape when I found it crippled on the surface, and bouncing around in my container with a bunch of green drakes didn't help.

This mayfly was collected from the West Branch of the Delaware River on June 1st, 2007 and added to on June 4th, 2007.

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