A perusal of the table of contents of this short symposium on Insect Endocrinology might lead those who are generally uninstructed in Fraenkel’s activities to wonder as to our choice of papers. Our justification is based upon our effort to concentrate the symposium upon a single area in which he has had an extended involvement: namely, the metamorphic molt in flies. In so doing, we immediately recognized the enormous humoral and physiological ramifications, both direct and indirect, of such an interest. Our selection of these papers is an attempt to present the broad picture with a few quick strokes.
KeywordsJuvenile Hormone Corpus Allatum Corpus Cardiacum Pause State Pupal Diapause
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