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Phorid flies develop by egg, larva, pupa and adult.  The female will lay about 20 eggs at a time  and will lay about 40 eggs in a 12 hour period.  Each adult female Phorid will lay approximately 500 eggs.  The tiny eggs are deposited on or near the surface of decaying organic matter.    Larvae emerge in 24 hours and feed for 8 to 16 days.  The Phorid fly larvae then crawl to a drier spot to pupate.  The life cycle from egg to adult can be completed in as little as 14 days (under ideal conditions) but may take as long as 37 days to complete their cycle.

Phorid Flies : are found in sewage contaminated soil, garbage, drains, human cadavers, rotting vegetables and fruit, garbage as well as damp organic materials.