Abstract
In starved females of Tenebrio molitor vitellogenesis is abnormal. Allatectomy completely inhibits the phenomenon. Feeding stimulates the brain: its allatotrophic hormone induces activation of the corpora allata. This hormone ensures the synthesis and release of vitellogenic proteins that are particularly abundant in the haemolymph of fed adult females. The synthesis of the vitellogenic proteins begins at the pharate pupal stage. We isolate these proteinic fractions in the male or female fat body. Stored in this organ, the characteristic proteins of the female haemolymph are released after adult ecdysis. The juvenile hormone does not seem to have a gonadotrophic function in T. molitor.
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