Relative size of pupa, last instar, and adult spider mite destroyer, Stethorus picipes.

Line art illustration of insect size in comparison with a 1-inch ruler also marked in mm, a bug box Credit: Quayle HJ. 1912. Red spiders and mites of citrus trees. UC Agric. Exper. Sta. Bull. 234. Adapted by UC IPM.
Credit: Quayle HJ. 1912. Red spiders and mites of citrus trees. UC Agric. Exper. Sta. Bull. 234. Adapted by UC IPM.