Abstract
Whereas in the female of Gomphocerus rufus L. allatectomy and/or coagulation of the pars intercerebralis prevent sexual receptivity, sexual behavior in the male is unaffected by these operations. Removal of the corpora allata and coagulation of the pars intercerebralis at the same time, followed by reimplantation of corpora allata 6–12 days later, caused renewed incorporation of yolk in the terminal oocytes. It is suggested that the corpora allata act directly on the ovaries. The A′-cells of the ventral ganglionic chain in the female supply the flat neurohemal organs with neurosecretory material. Cauterization of the A′-cells results in a 50% decrease of egg production. Implantation of homogenates of flat neurohemal organs into pars-cauterized females can induce partial development of the terminal oocytes. It is suggested that the A′-cells produce part of the neurosecretory material necessary for egg development. Double operations in the male, in which the corpora allata were removed and the pars intercerebralis destroyed, followed by reimplantation of corpora allata 6–10 days later, reinitiated secretion in the hitherto inactivated accessory sex glands, and spermatophores were produced. It is suggested that the corpora allata affect the activity of the accessory sex glands in a direct way.
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