Printed in Great Britain THE IMAGINAL ECDYSIS OF BLOWFLIES. EVIDENCE FOR A CHANGE IN THE MECHANICAL PROPERTIES OF THE CUTICLE AT EXPANSION

The characteristic digging movements and the expansion process in newly emerged blowflies both involve the production of internal hydrostatic pressures of approxi-mately the same magnitude (Cottrell, 1962c). The peak pressures achieved during expansion are maintained for several minutes while those involved in a digging cycl