Prociphilus is a genus of insects belonging to the family Aphididae. These small insects are commonly known as woolly aphids due to their fluffy appearance. They are typically found on various species of trees and shrubs, where they feed on plant sap using their piercing-sucking mouthparts. Prociphilus species are known to produce waxy secretions that form a protective woolly coating, which helps them to camouflage and protect against predators.