Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . THE INSECT WORLD. 199 beetles belonging to this series. None of them are in any wayinjurious. The exception in food habits in this family is found in thegenus , containing oblong, very convex species, with rough,tuberculate or pitted wing-covers, and a deeply furrowed are usually more or less incrusted with dirt, are foundfeeding under old skins, bones, or hoofs, and are, as scavengers,at least innoxious. The more typical leaf-chafers are of diverse forms, of
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . THE INSECT WORLD. 199 beetles belonging to this series. None of them are in any wayinjurious. The exception in food habits in this family is found in thegenus , containing oblong, very convex species, with rough,tuberculate or pitted wing-covers, and a deeply furrowed are usually more or less incrusted with dirt, are foundfeeding under old skins, bones, or hoofs, and are, as scavengers,at least innoxious. The more typical leaf-chafers are of diverse forms, oftencommon and economically important. Among the first we reach Fig. Rose-chafer, Macrodadylussuhspinostts.—a, beetle; b, head and thorax, in outline, fromside; e ,e;, structural details. the genus Macrodactylus, of which the rose-chafer, orrose-bug is a member. This appears in June at about thetime roses and grapes come into blossom, and eats their flowersin preference to anything else. Occasionally, for a series of years, the insects appear in ever-increasing abundance, until tiie swarms are so great that theyruin not only vineyards but orchards and gardens, eating almostevery kind of fruit and flower. In the presence of such swarmswe are almost helpless, and insecticides are of no possible contact poison kills them, and the arsenites or other stomach 200 AN ECONOMIC ENTOMOLOGY. poisons act too slowly, as two or three days suffice to ruin a vine-yard. Lest this seem strange, I will state that I have seen onhundreds of acres of vineyard every vine bearing multitudes, andevery bunch of blossoms from two to ten, or even more have c
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
