Printed m Great Britain THE IMAGINAL ECDYSIS OF BLOWFLIES. OBSERVATIONS ON THE HYDROSTATIC MECHANISMS INVOLVED IN DIGGING AND EXPANSION

In cyclorrhaphous Diptera the splitting and shedding of the old cuticle has become independent of air-swallowing and expansion of the new cuticle can be delayed for considerable periods after emergence. This makes these insects particularly suitable for studying the internal pressures created before and during expansion