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Photo#261378
Larvae and

Larvae and "puparia"
Pennypack Restoration Trust, Montgomery County, Pennsylvania, USA
March 22, 2009
Size: 5-7 mm
I guess that they are some kind of midge larvae and puparia. I found them under bark of what I think was a beech dead log.
The larvae were 5-7 mm long, the pupae 3.5 mm.

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Larvae and Larvae and Larvae and Larvae and Larvae and Larvae and Larvae and

Puparia
Well, not a midge--Nematocera don't form puparia (well, I guess there are a couple that do something similar, but I believe this is a "higher" fly). I guess we'll find out what they are soon?

 
Life cycle
I wasn't very hopeful but the flies emerged after a few days (I almost let them fly away accidentally) and you were right they are not Nematocera.

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