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and simply made a small hole near the base of the corn-stalk in which to 
pupate. Early in the fall of 1919 examinations carried on throughout 
the state showed that this borer commonly leaves the smartweed early 
Fic. 5. Larvae of the smartweed borer 
(Pyrausta obumbratilis Lederer) in 
stems of Amaranthus (left) and corn 
(right). 
in fall, where the infestation is heavy, and migrates to corn (Fig. 5) and 
a number of other plants. We have never taken it in corn where the 
corn was growing more than thirty feet from infested smartweed. It 
apparently does no injury whatever to the corn, simply boring a small 
gallery in the stalk in which to pass the winter, and it does not enter 
