Spontaneous;larval marking like pS; body black with white stripe on posterior margin of each segment, center line on ventral side black: S2(第2黒縞, Striped-2, X-ray induced), SD(淡黒縞, Dilute striped), SD(淡黒縞, Dilute striped), SW(白胸黒縞, White thorax striped, heat-induced).