. Economic entomology for the . FiG. 36. antennae or feelers. The head is very large, with small, coarsely granulated com- pound eyes. The mouth or- gans are mandibulate, but not at all prominent, and fitted for gnawing rather than biting,—whence the insects have been called Corrodentia A book-louse, X 25 diameters. or "; They are white or dirty-yellow in color, and look just enough Hke true lice to be mistaken for them under some circum- stances. Occasionally con- ditions favor their increase in houses, and almost in a day it will be overrun, beds and •

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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublishernp, bookyear1896