Scanning electron micrograph showing a representative cross-sectional view of a mesothoracic leg used to estimate cuticle thickness. Overlaid in white are the outlines of the inner and outer cuticle borders along with the initial eight measurements of cuticle thickness. Measurements were taken starting near the tendon and the section immediately across (1). The halves created by this division were subsequently divided four additional times. Only the first two divisions (2 and 3) are indicated here.