Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . s, the anterior border of the fore-wings margined with scarlet, while thehind wings are each furnished with along tail. When these caterpillars are noticedon a cultivated plant they can beeasily picked off and destroyed, butas a rule their natural enemies serveto keep them reduced to compara-tively small numbers. These Ameri-can species produce a much greaterquantity of silk, of a much stoutertexture than the Chinese silk-wormproper; but, unlike it, their threadcannot be reel
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . s, the anterior border of the fore-wings margined with scarlet, while thehind wings are each furnished with along tail. When these caterpillars are noticedon a cultivated plant they can beeasily picked off and destroyed, butas a rule their natural enemies serveto keep them reduced to compara-tively small numbers. These Ameri-can species produce a much greaterquantity of silk, of a much stoutertexture than the Chinese silk-wormproper; but, unlike it, their threadcannot be reeled. It is this that makesit impossible to use our species suc-cessfully for the production of a cheapand strong silken fabric. We sometimes find on corn, clover,apple, and other plants or trees agreen caterpillar, with a brown stripe edged with white on eachside of the body, covered also with little processes, from whicharise clusters of prickly spines. These have urticating proper-ties, so that if the larvae are carelessly handled a certain amount ofirritation may arise, though much less than is the case with the. Cocoon of the cecijpia moth. THE IXSECT WORLD. 2S3 slug-like caterpillars previously described. They become rathermore than two inches in kiii^th, spin a thin, irregular, and some-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
