Abstract
ABSTRACT. When female Stomoxys calcitrans were supplied a daily blood‐meal their polytrophic ovaries developed and deposited yolk, whereas those of females fed only 5% sucrose deposited no yolk and remained in a ‘resting’ condition. Longevity of the sugar‐fed flies was also reduced. Blood feeding was thus obligatory for general metabolism as well as reproduction. The follicles did not develop in females allatectomized within 1 h of emergence, irrespective of diet, and degenerated if blood was not provided. If blood was available the follicles did not degenerate, nor did they accumulate yolk. In both circumstances development was restored by implanting corpora allata. If allatectomy was delayed until 72 h after eclosion the follicles of sugar‐fed flies developed to the resting stage, and those of blood‐fed flies deposited yolk.
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