Pyrameis cardui.—Larva found feeding on thistle, June 15th, fullgrown. Length, 1¼ to 1⅜ inches.

Head black, reddish in some specimens, above sprinkled with fine whitish hairs, and a few small black tubercles.

Body above greyish-brown, variegated with yellow and black. Second, third, fourth, fifth, and terminal segments black, with many whitish dots. A broken dorsal stripe, white anteriorly; yellow from fifth to terminal segments; second segment without spines, but covered with fine whitish hairs; third and fourth segments have four spines each ; the others have seven, excepting tbe terminal ones, which have two pairs, one placed behind the other.