1. The Pilcomayo‑Paraguay‑Parana Region.

New material has been received which adds further proof that in the Guarani area the predominant type is the Yellow Soft Guarani corn and in the Caingang area the White Soft‑Dent Corn, Guarani Yellow is also now being cultivated by the Caingang, but no white dent is found outside the Caingang reservations. The large‑kernelled white flint is limited to the Guarani area, though much less frequent than the Soft Yellow. Pointed popcorn is scattered over the whole region.