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Photo#255726
Stonefly - Allocapnia nivicola

Stonefly - Allocapnia nivicola
Pepperell, Middlesex County, Massachusetts, USA
February 27, 2009
Size: 6mm

Don
This one looks a lot like the A. pygmaea. How would I be able to tell the difference between the 2 species?

 
You
must pull some of the mouthparts out and also look at the setation on the abdomen in lateral view. Not particularly fun as the differences are subtle.

Allocapnia nivicola
again.

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