As in all insects, aphids have three pairs of legs, one on each segment of the thorax

The three pairs of legs are alternately called 1) the front legs, middle legs, and hind legs or 2) the forelegs, midlegs, and hindlegs, or 3) the prothroacic legs, mesothoracic legs, and metathoracic legs. In turn, the various segments of each leg can also be distinguished. The tibia, for example, might be called the front tibia, prothoracic tibia, or protibia; middle tibia, mesothoracic tibia, or mesotibia; and hind tibia, metathoracic tibia, or metatibia.