. A manual of zoology. Zoology. Fig. 526.—Cicada orni. (From Schmarda.) or Jassid^, contain some injurious forms, Ei-ythronura vitis damaging the grape, while the true hoppers, Membracid^ (fig. 527), are scarcely less injurious. None of these, however, are such serious pests as the plant lice and scale insects. In the CocciD^, or scale insects, the wingless female dies after laying the eggs and covers them with her dead scale-like body. Here belong the cochineal insects, Coccus cacti* the dried bodies of which furnish the pigment carmine, and the lac insects, Coccus Jacca, as well as a host of
. A manual of zoology. Zoology. Fig. 526.—Cicada orni. (From Schmarda.) or Jassid^, contain some injurious forms, Ei-ythronura vitis damaging the grape, while the true hoppers, Membracid^ (fig. 527), are scarcely less injurious. None of these, however, are such serious pests as the plant lice and scale insects. In the CocciD^, or scale insects, the wingless female dies after laying the eggs and covers them with her dead scale-like body. Here belong the cochineal insects, Coccus cacti* the dried bodies of which furnish the pigment carmine, and the lac insects, Coccus Jacca, as well as a host of injurious forms, like the orange scale, Aspidotiis aiiraiitii,''- and the worse San Jose scale, A. peniiciosKs,* which has recently been spread throughout the country. The , or plant lice, ari! sdft-skinncd and with tlicir honey-containing c-Kcrcment form a subslralum for the growth of injurious fungi. They reproduce largely by parthe- nogenesis, a reason for their rapid multiplication ; but their spread is not rapid, since the usually vivip-. Fio. f,27.~Cfre!i'i huhn- liis* liuftalo loaf liop- I)cr. (After Marlatt.). 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 Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
