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Cocoon - Cecidomyia

Cocoon - Cecidomyia
Fort Bragg, Cumberland County, North Carolina, USA
March 19, 2006
Size: under 5 mm
I keep finding these all over the place, but mostly on pine needles.

Images of this individual: tag all
Cocoon - Cecidomyia Midge life cycle - Cecidomyia Gall Midge - Cecidomyia

Pine resin midge
See here.

One option is Cecidomyia piniinopis, the gouty pitch midge, whose larva Packard says "fastens itself to a pine leaf and remains motionless until the resinous exudation resulting from its attacks hardens, forming a cocoon-like pupa case or puparium." But since the Forestry Images page just gives the genus, I presume there are other possibilities.

thanks for that info Charley.


Based on the image of the eclosed adult clearly a cecidomyiid (note wing venation), either Porricondylinae or Cecidomyiinae. Nice series of biological images!


Fungus gnat cocoon
I just wanted to point out that these cocoon pictures are incorrectly filed under sawflies etc.
I just read in this book that fungus gnat "pupation takes place mostly in delicate cocoons and a few are suspended by some loose silk from the surface of fungi or other objects." I've seen a couple of other vague references to this, but it's nice to see actual photos of what this looks like!

Got it.
It just hatched or popped out or whatever. It's a fungus fly of some kind. I'll try to get shots later today.

My guess would be a cocoon. For one thing, eggs are hardly, if ever, oriented horizontally to the substrate (ok, Microcentrum katydids being an obvious exception).

Ok, I guess I'll bring one home and see what pops out. Thanks.

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