Length of larva, one and one-eighth inches; breadth at widest part, three-sixteenths of an inch. The body flattened beneath, and slightly rounded above. It is scalloped along the sides. The legs proper are long and projecting. The creature has the habit of twisting the last four or five segments to one side. When disturbed it throws itself into the usual attitude of a Nematus larva. Its general color is yellow—the head has an orange tinge. There are ten rows of black spots on the body—six rows along the back, one row on each side, and two rows underneath. The spots of the side rows are longer than the rest, and are placed olre on the fore part of each scallop. In each of the rows on the back the spots run three to a segment. The last segment has no spots. The eyes of the larva are black, and the mandibles are brown. The creature forms a rather loose, white cocoon.