Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 THE IXSECT WORLD. 207 Fig. 196. Phymatodrs aiiitriins: pupa and adult. sometimes killed, an o\d cherry-tree, fully eighteen inches in trunk diameter, which died rather suddenly, having the roots absolutely riddled in every direction by a dozen or more of these immense creatures. The species of Phymatodes are much smaller, a little flattened, with an oval thorax and a tendency to blue and yellow colors. T
Economic entomology for the farmer Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges; economicentomol00smit Year: 1906 THE IXSECT WORLD. 207 Fig. 196. Phymatodrs aiiitriins: pupa and adult. sometimes killed, an o\d cherry-tree, fully eighteen inches in trunk diameter, which died rather suddenly, having the roots absolutely riddled in every direction by a dozen or more of these immense creatures. The species of Phymatodes are much smaller, a little flattened, with an oval thorax and a tendency to blue and yellow colors. The larvae feed only in dead or dying wood : P. anicenus, a bright blue species with yellow thorax, attacking dead shoots of grape, while P. varius and P. variabilis live under the bark of oak cord- wood. The beetles appear in spring and lay their eggs in dying wood or in wood cut during the winter, often in such numbers that the bark is com- pletely loosened by the larvae and will, next spring, slip off in its entirety. They are hence called 'bark-slippers' by wood- men. In the Southern States they infest tan-bark, sometimes injuring it considerably. Cutting the trees during the summer, after the beetles have disappeared, or very early in fall will put the bark and wood in such condition that it will not be attractive the season next following. The species oi Elaphidion are narrow, brown beetles, covered with whitish, somewhat mot- tled pubescence, and ha\'e long r\G. 197. and rather stout antennae. They are known as ' oak- pruners,' because the larvae of several species bore into twigs and branches of oak and, when nearly full grown, girdle them from the inside, so that the first high wind of early winter breaks them off, carry ing the larvae to the ground. Transformation is completed in the June or July following. Often, during late summer, the wilting of a twig or small branch indi-
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