Snowberry Clearwing caterpillar

Caterpillars pass through five instars and are pale green on the back and darker green on the sides, with numerous white flecks in the final instar. The anal horn is bright yellow at base and blue-black at the tip. There are longitudinal brown stripes on the underside. The legs are almost white and barred with dark brown. There is a double row of yellow granules on the first segment which projects over head. The spiracles along side of body are very evident, being ringed in pale blue.