The toxicity of acridine toAcheta domesticus(L.) was determined to evaluate the potential for this pollutant from synthetic fuels production to affect insect populations. Acridine was highly toxic to cricket eggs but not toxic to nymphs or adults. An LD50for eggs = 7.4 εg/g was calculated from the LC50= 15.1±0.61 ppm. The 24-h LD10of acridine to nymphal crickets was>332 εg/g. Male and female crickets consumed up to 1.0% of their weight in acridine over an 18-day period with no significant effect on mortality, weight gain, digestibility of food, or fecundity. Percent hatch of eggs from treated crickets (81.0±6.7) was not significantly different from controls (77.2±5.1).