. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. THE CLASSIFICATION OF INSECTS 161 of houses, and in the southeastern states they have been found infesting living plants, particularly orange trees, guava bushes, sugar cane and pampas grass. The largest and most abundant species, Termopsis augusticollis, on the Pacific coast, makes its nest by mining in dead stumps and logs and sometimes ruins telephone and telegraph poles in this way. A single com- munity of this species may include thousands of individuals. Order Corrodentia.—-The order Corrodentia, or book-lic
. Elementary textbook of economic zoology and entomology. Zoology; Insect pests. THE CLASSIFICATION OF INSECTS 161 of houses, and in the southeastern states they have been found infesting living plants, particularly orange trees, guava bushes, sugar cane and pampas grass. The largest and most abundant species, Termopsis augusticollis, on the Pacific coast, makes its nest by mining in dead stumps and logs and sometimes ruins telephone and telegraph poles in this way. A single com- munity of this species may include thousands of individuals. Order Corrodentia.—-The order Corrodentia, or book-lice and bark-lice, is composed of very small insects most of which, composing the family Psocida, have two pairs of wings and a plump rounded body, while the others, forming the family Atropida, have no wings or only small wing scales or buds and a flattened body. The Psocidae are the bark-lice and are commonly found in small clusters on bark, while the Atropidse are the so-called book- lice, common in old books and on dry dead organic matter. In both families the mouth-parts are of the biting type, with the jaws especi- ally strong and heavy for the success- ful biting off and chewing of hard dried food. Atropos divifiatoria is the spe- cies usually found in books. It is about 1/25 of an inch long, grayish- white, with slender projecting antennae, and small eyes look- ing like distinct black spots on the head. It does not limit its feeding to the paste of book bindings but does much dam- age to dried insects in collections. Order Mallophaga.—The Mallophaga, or biting bird-lice, compose a group of about 1500 known species, all of which live as external parasites on the bodies of birds and mammals. They have strong biting mouth-parts, and feed exclusively on the hairs or feathers of their host. They do not, like the true lice, suck blood. The body varies from 1/25 to 1/3 of an inch long, is wholly wingless and much flattened. The insects have no compound. FIG. 74.—A wingless
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