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Just to see, I made up a quick whole mount (with pressure) of an Anthomyiid using KOH at room temperature for 24 hours. I kept the solution in a dark cupboard as I had heard KOH is somewhat sensitive to light exposure. I suppose I'm pleased with the results even if I didn't bother cleaning it properly of debris prior to mounting, and it hasn't cured yet.

I was most struck by the fact that none of the flies I had processed under heat retained the level of detail in the ovipositor (I can only guess that is the identity of the long structure projecting from the abdomen?). Apologies for the image quality, I pressed into service a 48mm objective that is sorely in need of cleaning so that I could provide as large a field of view as possible.

Slow connection warning; the images are quite large.

Overview: http://imageshack...qJUTNt.jpg

Ovipositor: http://imageshack...EtxHuy.jpg