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Photo#936739
Cecidomyiidae, larvae on rust - Mycodiplosis

Cecidomyiidae, larvae on rust - Mycodiplosis
Plymouth Rock, Winneshiek County, Iowa, USA
June 11, 2014
Batch
Fly larvae in with the (undetermined) rust aecial cups and spores on an (undetermined) plant.
I've never been able to rear fly larvae on rust.
More of the story here
September 12, 2016: Dr. Gagné ID’d as Mycodiplosis sp.

Images of this individual: tag all
Cecidomyiidae, larvae on rust - Mycodiplosis Cecidomyiidae, more larvae on rust - Mycodiplosis

Moved

Moved

Cecidomyiid
I think it's safe to say this is a cecidomyiid.

 
Just Wednesday
I was showing a friend how a lot of rusts will have orange fly larvae feeding on them. But I have never been able to rear a single adult fly from any of the rusts. Have you? Any words of wisdom for rearing?

 
Never tried
But I've accidentally reared Mycodiplosis adults a few times while trying to rear leafminers, and I imagine the larvae had been feeding on unseen fungal growth. They just appeared in the vials without any special attention. If I were trying to rear them, I would put the leaves in jars with soil for them to burrow into, since that's what other gall midges want.

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