Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 CHAPTER XXII INSECTS ON THE FARM 225. There are a great many kinds of insects found on the farm, many of them useful, while other kinds are injurious because they feed on plants, stored products, and domestic animals, according to the habits of the pest in each case, and even our own comfort and health are affected by various forms of these creatures. Not all the small animals are properly called insects. Insects have just six legs, and their bodi
Elementary principles of agriculture Elementary principles of agriculture : a text book for the common schools . elementaryprinci02ferg Year: 1913 CHAPTER XXII INSECTS ON THE FARM 225. There are a great many kinds of insects found on the farm, many of them useful, while other kinds are injurious because they feed on plants, stored products, and domestic animals, according to the habits of the pest in each case, and even our own comfort and health are affected by various forms of these creatures. Not all the small animals are properly called insects. Insects have just six legs, and their bodies are made up of three parts that may be easily distinguished: First, the head; second, the thorax, or middle part; and third, the abdomen. The spiders, ticks, mites and scorpions have eight legs and never have wings. The common sow- bug has fourteen legs and is classed with the crabs and craw-fish rather than true insects. 226. Changes of Form in the Growth of Insects. Nearl} all species of in- sects have foul forms in passing from the egg to the mature insect It ^'^' ^^' ^^^^^^ ''^ 'â ^^ ''^® history of the June- ... bug. After Howard Division of Entomology, IS like the story of united states Department of Agriculture. (155)
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