Color changes due to virus infections are observed in both dead and living insects. The blue coloration asso- ciated with iridescent viruses may be pale to a deep blueepurple with a distinct iridescence. Less commonly, orange iridescent virus may also be observed in mosquito larvae. Chalky white zones in the midgut and fat body are observed with some viruses. In aquatic Diptera, NPV in mosquitoes and CPV in mosquitoes, black flies and others are distinctly observed in the midgut region as chalky white areas. Color changes in Lepidoptera due to patent infections of NPV and GV may result in a change from normal color to white, gray, or light brown. The normal.
