RESUMO
Two neurohormones produced by two distinctive neurosecretory median cells [A [1], B] of the protocerebum have been characterized in Locusta migratoria; each with multiple functions one called neuroparsin and one stimuling the ovarian maturation called lom OMP. Using the specific immunoserum of these two neurohormones in Schistocerca gregaria, we could demonstrate the occuring of molecules related to the neuroparsin and lom OMP of Locusta. Through histology studies of the brain and corpora cardiaca complex, the immunserum revealed the presence of the two types of these neurosecretory cells suggesting the occuring in Locusta as well as Schistocerca of the same cells releasing molecules immunologically apparent to neuroparsin and lom OMP. The results were confirmed by electrophoretic separation of corpora cardiaca extract under unreduced conditions followed by a transfer on immobilon membrane