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; . economicentomolo00smit Year: 1906 THE INSECT WORLD. 185 adopting- the practice best suited to secure exemption in his case. It may be added, however, that the fertihzers will not prove satis- factory unless applied as directed,â, in one heavy application and when the ground is bare. The species of the family Buprestidcz resemble the click- beetles in general form, but theprothorax is firmly articulated to the rest of the body, so th
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; . economicentomolo00smit Year: 1906 THE INSECT WORLD. 185 adopting- the practice best suited to secure exemption in his case. It may be added, however, that the fertihzers will not prove satis- factory unless applied as directed,â, in one heavy application and when the ground is bare. The species of the family Buprestidcz resemble the click- beetles in general form, but theprothorax is firmly articulated to the rest of the body, so that the insects have no 'springing' powers, and the colors are metallic. The beetles vary much in appearance, but the larvce resemble each other closely, being always flattened in form, with greatly enlarged anterior segments. They are usually known as ' flat-headed borers,' sometimes as â ' hammer-heads,' and infest not only trees but shrubs, vines, and sometimes even herbaceous plants. Some of the species prefer dead or dying wood, some attack healthy plants only, while others, and perhaps the majority, are ^^*^^- somewhat indifferent, yet are oftener found in weak than in healthy and vigorous trees. Our largest Eastern species belong to the genus Chalcophora, the larvae mostly feeding on conifers, though two of them feed on deciduous trees like the sycamore. The beetles have the elytra quite deeply and irregularly furrowed, while chaicophora m- the colors are bronze, brown, or blackish. I have found the larvae in quite old and decaying logs, but they are said to attack healthy trees as well, and to cause occasional injury. The genus Diccrca contains robust species, sometimes nar- rowing so strongly toward the tip as to seem almost tailed. The wing-covers are decidedly convex, irregularly corru- gated, or even reticulated, with elevated spots, and f,^^e^X the colors are bright bronze-brown, often with green- ish or brassy reflections. They are rarely common, but infest a var
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