Eye colour: w1/w1/w+O triploids maroon, contain less red pigment than w1/w1/w+C. Amount of pigment in diploid w+O/w1 less than w+C/w1, but difference is not readily detected visually. Homozygotes of w+C/w+C and w+O/w+O contain same amount of red eye pigment. RK3.