The pond at Newton GPC (annoyingly fancified by Google)
Place each insect into sterile* 4 dram vials containing Alga Gro Media, incubate for a period of time long enough to back to pond with a pipette to get 100ul straight pond water.
Remove insects with sterile* forceps, spread 250ul onto nutrient agar plates. Incubate at room temperature 5 days.
*sterile – Oh what I wouldn’t give for an autoclave that I can run whenever I want. I had to sterilize the vials with 70% ethanol (didn’t make myself, might not be exactly 70% (oh what I wouldn’t give for a 2L bottle of 95% ethanol)). So things were “as sterile as I could make them”. I processed the samples A, B, C, D, + Pond, then Blank.
Conclusions (well, I guess “Suspicions” is more accurate): Given that all of the contamination on the Blank plate is mold and looks like the same species, and there are a variety of species on the insect samples, at least some of those probably came from the insects.