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Quarterly Journal of Microscopical Science, Vol s3-98, 241-249, Copyright © 1957 by Company of Biologists

The Supposed Pre-pupa in Cyclorrhaphous Diptera

JOAN M. WHITTEN 1

1 Queen Mary College, University of London

The pre-pupal cuticle generally described for Diptera Cyclorrhapha is here considered to be an inner layer of larval endocuticle rather than the cuticle of a distinct pre-pupal instar. Chemical and microscopical evidence is given. The mechanism of rupture of the operculum is also discussed in connexion with endocuticle secretion, sclerotization, and subsequent water loss.






© The Company of Biologists Ltd 1957