Age and oxygen toxicity related fluorescence in the honey bee thorax

The blue fluorescent material in thoraxes of honey bees of known adult age from eclosion to 28 days was measured. The amount was greater in older insects and exposure to ozone (ppm) augmented the rate of accumulation. The nearly constant daylight flying by the bees and the ozone effect suggest radical peroxidative origin of the fluorescence. The material was partially purified by chromatography. It is a relatively non-polar lipid.