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 economicentomol00smit Year: 1906 THE INSECT WORLD. 287 retracted, and the tongue is obsolete, so that the insect is in- capable of feeding. None of our American species attack culti- vated plants or trees so as to become injurious, though in forests Fig. 320. Goat-moths, Prionoxystus robiniie, female and male, and their larva. young oak timber is sometimes badly injured by the Prionoxys- tus robinicB. There has been recently introduced into the Eastern United States a
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 economicentomol00smit Year: 1906 THE INSECT WORLD. 287 retracted, and the tongue is obsolete, so that the insect is in- capable of feeding. None of our American species attack culti- vated plants or trees so as to become injurious, though in forests Fig. 320. Goat-moths, Prionoxystus robiniie, female and male, and their larva. young oak timber is sometimes badly injured by the Prionoxys- tus robinicB. There has been recently introduced into the Eastern United States a European species known as the leopard-moth, Zeuzera pyrina, and this has become a pest on the shade-trees in several of our Eastern cities. The male moths expand a little more than an inch, the female over two inches, and both are white, spotted with black, whence the common name ' leopard-moth.' There is great difficulty in dealing with insects of this character, owing to their food habits. Fortunately, even in this imported form, the natural checks seem to prevent its doing much injury to orchards or country trees ; but in the cities and towns it threat- ens the life of the shade-trees. The onlv recommendation to
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