. Entomology for medical officers. Insect pests; Insects as carriers of disease. ORDER CORRODENTIA 253 in the same order with the termites, or with the Orthoptera. The wings, when they are present, are like those of termites in form and in being all alike, but they are not caducous, and they have a peculiar imperfect venation. The species are found in sheltered places, under stones, on bark, in wood and thatch, etc., and they spin webs for protection. Order CORRODENTiA: Book-lice. (Lat. corrodere = to gnaw.) This order stands for a single family, the PsocidcB (? Gr. \/f60X<'? = *^"st),
. Entomology for medical officers. Insect pests; Insects as carriers of disease. ORDER CORRODENTIA 253 in the same order with the termites, or with the Orthoptera. The wings, when they are present, are like those of termites in form and in being all alike, but they are not caducous, and they have a peculiar imperfect venation. The species are found in sheltered places, under stones, on bark, in wood and thatch, etc., and they spin webs for protection. Order CORRODENTiA: Book-lice. (Lat. corrodere = to gnaw.) This order stands for a single family, the PsocidcB (? Gr. \/f60X<'? = *^"st), which are sometimes included in the Isoptera and sometimes in the Orthoptera. Book-lice (Fig. 115) are soft-bodied, and for the most part exceedingly minute insects, so named because certain. Fig. 115.—" Book-louse," from dried fish. species are commonly found in old books, eating the binding. They are also frequent pests of entomological collections, feeding not only upon the lining of the trays but also upon the specimens, and they will sometimes attack dried provisions. The head and eyes are (relatively) large, and the antennae are long and very slender: the mouth-parts are formed for biting. The thorax usually appears to consist of 2 segments. Metamorphosis incomplete. In the winged species both pairs of wings are membranous, the anteriov pair being the larger, and the veins are sinuous and prominent, the cross- veins being few. Many Psocids live in moss, lichen, the bark of trees, etc.,. 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 Alcock, A. (Alfred), 1859-1933. London, Gurney & Jackson
Size: 1420px × 1760px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpubl, booksubjectinsectpests
