Abstract
It is suggested that the idea of a sedentary pattern of existence diffused into southern Arizona from lower western Mexico or Guatemala by way of the region west of the Sierra Madre. It is also suggested that this transmission occurred shortly after the introduction of a teosinte-infectedchapalotecorn into the Southwest, a type that was better suited to low, arid regions than the chapalote corn that preceded it. The spread of this sedentary complex from southern Arizona into other areas also is outlined.