Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; . economicentomol00smit Year: 1906 2o6 AN ECONOMIC ENTOMOLOGY. length. It is not economically important, unlike the 'broad- necked Prionus,' P. laticollis, whose larvae in blackberry are known as 'giant root-borers.' The beetle is black, robust, broader than usual, with a broad, toothed thorax, and from one to two inches in length. The larvae are immense, nearly three inches for a full-grown female, and they feed in the roots of a Fig. 195.

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