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Fly  - Brachydeutera longipes

Fly - Brachydeutera longipes
Raleigh, wake County, North Carolina, USA
October 8, 2011
Size: 4-5 mm
Found on stagnant water. Walks and jumps on water.

Moved tentatively
Moved from Brachydeutera.

Same as on
I just commented on your posting of a Brachydeutera on This also looks like it may be B. longipes. Do you know if they are the same individual or from the same population? The photo on shows the necessary character for species ID quite well.

Post was

probably not
the same individual, but likely the same population. The image was taken the same day and within minutes of each other. What is the necessary character? Can you match the larva to the adult?

In Mathis & Steiner 1986, Brachydeutera longipes is separated from the other three North American species by having the dorsal brown color gradually merging with the gray ventral color. In the other species, it is an abrupt change (see images of B. argentata).

I know nothing of the larvae, but B. longipes is a well studied Old World species, and I believe the larvae have been described.

even though
it is well studied as you say, I could not find anything on the larva. Still a bit of a mystery. I could not get the flies this year, as it rained a lot in NC and could not keep water to stagnate enough to attract these flies... try again next year.

Moved from Flies.

Moved from ID Request.

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