THE INFLUENCE of the corpora allata on the activity of the reproductive organs has been studied in several insect species. Most authors agree that the corpora allata are necessary for the normal function of the ovary, but not of the testis (Wigglesworth, 1936; Thomsen, 1940, 1942; Vogt, 1940, 1942; Day, 1943; but see Bounhiol, 1939). Among the Orthoptera only two species have been studied so far. In Melanoplus differentialis Pfeiffer (1939, 1945) demonstrated that removal of the corpora allata prevents the development of the ova and the secretory activity of the oviduct. On the other hand, according to Pflugfelder (1937, 1939) egg maturation proceeds in allatectomized females of Dixippus morosus, unless the corpora allata are removed during an early nymphal stage. Because of this discrepancy the problem of the relationship between corpora allata and reproductive organs has been studied in another Orthopteran, Leucophaea maderae.