5. Chimu‑Inca region in the Andes.

To the list of races given by Cutler (1946), I have to add one more: "Aizuma", a white flint corn with small regular cylindrical ears which is, evidently, quite related to the yellow flint "Uchuquilla".

After studying a larger number of strains of the popcorn "Pisankalla", the relation of this type to the Pointed Pop from the lowlands became much more evident.

The southern limits of this area seem to coincide both with the frontiers of the Inca empire and perhaps also with the pre-Colombian range of corn. However, a decision will be possible only after a careful study of what still has been left of maize of the Araucanians in Chile. It is, however, quite possible that these Indians, which are supposed to have cultivated a Bromus species, may not have known maize at all.

The northern limit seems to have been originally the Southern States of Colombia (Narinhos), thus including also Ecuador. To decide this question, new material from Northern Peru and from Ecuador are needed. The few samples, which I have received so far, give indications of the existence of other races than those of the Andean highlands, with slender cylindrical ears, and a more pronounced degree of denting.