Crab-LICE, so called from their resemblance to crab-fish. They infest the arm-pits, eye-lids, eyebrows, and pudenda of grown persons. They are flatish, and stick so close to the skin, that they can scarce be removed. They are also called platulae, petole, pessulatae, and, from their often infesting the pubes, they are called pediculi inguinales. They are destroyed either with black soap, mercurial ointments, oil of lavender, or a solution of sublimate in rose-water; of which last the proportion may be one drachm of sublimate to a pound of the water.