. Common Illinois insects : and why they are interesting. Insects -- Illinois. Silverfish {Thermobia domestica) This wingless household pest is one of the most primitive members of Class Insecta. (6x) THE NAMES AND CLASSIFICATION OF INSECTS People may be so bewildered by the diversity and number of insects that they are discouraged from trying to learn anything about them. It would be confusing indeed if the systematic zoologists had not done a great deal to put the animal house in order. As it now stands, almost any particular insect can be easily "pigeon-holed'' into one of the larger i
. Common Illinois insects : and why they are interesting. Insects -- Illinois. Silverfish {Thermobia domestica) This wingless household pest is one of the most primitive members of Class Insecta. (6x) THE NAMES AND CLASSIFICATION OF INSECTS People may be so bewildered by the diversity and number of insects that they are discouraged from trying to learn anything about them. It would be confusing indeed if the systematic zoologists had not done a great deal to put the animal house in order. As it now stands, almost any particular insect can be easily "pigeon-holed'' into one of the larger insect divisions or groupings, such as Family or Order. Surprising progress can be made in getting to know insects by learning about these groups to which they belong. A Latin name may seem useless but it always tells the specific kind of insect and it also tells the next larger group to which that insect be- longs, called the Genus. The genus name always comes first, then the name for the species. The still larger groupings into which insects are classified, such as Family and Order, are not revealed by the scientific name. Before looking further at the kinds of insects it should be noted how insects may be distinguished from the hosts of other little creatures that hop and crawl. The key to this is the distinctive body divisions of an insect, the head, thorax or midsection, and the abdomen. No other ani- mals have such a clean-cut separation of the body regions. On most adult insect heads there are two large shiny many-faceted eyes, a pair of antennae or feelers, and three simple eyes, called ocelli. The thorax usually carries two pairs of wings and six legs. The abdomen has simple ring-like joints that end in the mating or egg-laying Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Wright, A. Gilb
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