A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . -PierlB rapae: a, larva;-[Riley]. b, female.—[After Rhopalocera and Heteeooera. The former includes those forms knownpopularly as moths and the latter those which have received the name butterflies. 86 A PRELIMINARY INTRODUCTION The metamorphosis in these insects is complete, i. e., the larvae orcaterpillars are active, the pupae or chrysalids inac
A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . -PierlB rapae: a, larva;-[Riley]. b, female.—[After Rhopalocera and Heteeooera. The former includes those forms knownpopularly as moths and the latter those which have received the name butterflies. 86 A PRELIMINARY INTRODUCTION The metamorphosis in these insects is complete, i. e., the larvae orcaterpillars are active, the pupae or chrysalids inactive, and the changesbetween the different stages great. The caterpillars vary much amongthemselves in appearances. Some are smooth, others tuberculated andcovered with hairs and spines. Some feed in colonies, other are of them feed openly upon the foliage, while some draw leaves to-gether and in that manner protect themselves to a certain extent fromenemies. When mature, the devices adopted by lepidopterous larvae pre-paratory to pupating are also variable. Some spin cocoons of silk, someenter the earth and construct neat cells for themselves, and still othersmake the change in the open air without any protection whatsoever. In the selection of food-plants for
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894
