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Previous events

Marsh Fly - Sepedon armipes

Marsh Fly - Sepedon armipes
Stow, Middlesex County, Massachusetts, USA
February 15, 2006
Size: 8mm
Is this in the genus Dictyacium, with those long antennae?

Moved from Sepedon.
Thanks Bill!

Sepedon armipes Loew
From the leaf on which it is standing it is clear that this is a small species of Sepedon, of which S. armipes is by far the most common in northeastern North America. Females have normal hind femora, as shown here. Males have uniquely shaped hind femora in which the tibia fits into a clasp on the femur. If it were larger I'd call it S. fuscipennis. All species of Dictyacium I have seen have had very heavily patterned wings.

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