['Labrum - a cover which may be loosely referred to as the upper lip.', 'Mandibles - hard, powerful cutting jaws.', "Maxillae - 'pincers' which are less powerful than the mandibles. ... ", 'Labium - the lower cover, often referred to as the lower lip. ... ', 'Hypopharynx - a tongue-like structure in the floor of the mouth.']