In the Revista Industrial y Agrícola de Tucumán of November 1923 to January 1924, 4th year, numbers 6–8, Arthur H. Rosenfeld & T. C. Barber published an interesting article on the sugar-cane moth borer, known in Tucumán as the “ gusano chupador de la caña de azucar,” in which they detail the different effects of the said moth borer (Diatraea saccharalis).

Last year, Dr. William E. Cross, Director of the Estación Industrial y Agrícola de Tucumán, was good enough to entrust me with the study of some Diatraea parasites, the identification of which had, so far, only been effected generically.

My best thanks are due to Dr. Cross for having supplied me with material for this investigation, which I consider very interesting, owing to the daily increasing importance of the biological control of agricultural pests.

There is no doubt but that by continuing these investigations other parasites will be discovered ; this is as yet only the first step on the road which may lead to very important results.