11 



Pig. 1.— Map showing distribution of cotton boll weevil in the United States. The heavy line 

 indicates the limit of the region in which the weevils have multiplied to such an extent as to be 

 found in all cotton fields; the remainder of the shaded portion indicates the region in which 

 isolated colonics are known to exist (original). See correction in footnote on opposite page. 

 189 



