四黑目天蠶蛾
Saturnia pyretorum

前翅前緣內側至後線，有一非波浪型斜線，前翅亞緣線非鋸齒狀
Inner area of wings has linear-form stripes from anterior to the posterior margin of the wings, submarginal stripes of forewing is not zigzag

後翅無尾翼，顏色偏黃或褐色，未有綠色
Hindwing without tail, color major in yellow or brown and never in green

前翅R1自中室分出後，R2 及R3+4再從R1分出
In forewing, vein R2 and R3+4 derived from R1