Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . urbed bygrowth or undesired moisture. Sometimesshade-trees are attacked ; but merely gatheringand burning the fallen wood keeps the insectsin check. There are many other longicorns in our fauna,nearly six hundred species being listed in thecatalogues, and many are beautiful as well asinteresting. The few species referred to heredo not even illustrate all the different types,but are all that are sufficiently injurious to bereferred to at any length. Wooded regionsfurnish the g
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Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . urbed bygrowth or undesired moisture. Sometimesshade-trees are attacked ; but merely gatheringand burning the fallen wood keeps the insectsin check. There are many other longicorns in our fauna, nearly six hundred species being listed in thecatalogues, and many are beautiful as well asinteresting. The few species referred to heredo not even illustrate all the different types, but are all that are sufficiently injurious to bereferred to at any length. Wooded regionsfurnish the greatest variety of species, and allportions of the trees furnish support for theirlarva;. The family Chrysomelidce, or leaf-beetles, contains speciesthat, in the main, feed upon leaf-tissue in the larval as well asadult stages, and many of them attack cultivated crops. Thebeetles may be distinguished by the tarsal structure alreadydescribed, by their usually moderate or small size, short antennaewhich are not situated on frontal prominences, and by theirusually margined, not cylindrical prothi»rax. The larva vary. The twig-gird-ler, Oncideres cin-gulatus.—a, beetleat work ; b, egg-puncture; c, gird-ling done by beetle ;f, egg. Fig. 20T.