The dust mites continued to swim around and lived for days even in buffered glutaraldehyde. They finally added acrolein to the fixative and this not only killed the mites immediately but somehow allowed low viscosity resins to penetrate the mites chitinous shells. Acrolein is hazardous and should only be used in a fume hood. It is available from Polysciences. Reduce the concentration during the extended dehydration steps.
Last step is FULL resin mixture.
Do not use stains prepared in alcohols. During dehydration ethanol is prefered when embedding in LR White. Change the solution with new mixture in about every 30 min. This procedure also required longer infiltration periods in Spurr's resin, but was the only method that worked. I thank everyone who sent us advice in this area, however we are still unable to successfully infiltrate the eggs.