Form same as S. cecropia; number and position of tubercles also the same. General color green; bright yellowish green on dorsal surface; pea green on head, sides and under surface. Length when at rest exactly two and a quarter inches; when in motion almost two and three-quarter inches.

Head pea green, mouth parts pinkish grey, mandibles black.

Dorsal surface-First segment with four small flattened transversely oval warts, consisting of a black ring with a white centre; 2nd, 3rd and 4th segments each with two large bulbous tubercles,cream color,at base; above this there is a raised or swollen ring of black; remainder coral red, with seven upright spines on top; 5th, 6th, 7th, 8th, 9th and 10th segments each with two simple tubercles, basal half white, remainder bright yellow.