. The insect book [microform] : a popular account of the bees, wasps, ants, grasshoppers, flies and other North American insects exclusive of the butterflies, moths and beetles, with full life histories, tables and bibliographies. Insectes; Insects. The Scale Iniecta the tree which seem to be seriously affected. Older twigs, how- ever are also attacked, and many specimens of the insect may be found upon the trunk. As soon as the young insect finds a suitable position it gradually inserts its beak and commences to grow through the influence of the healthy food sap which it pumps up. Almost imme
. The insect book [microform] : a popular account of the bees, wasps, ants, grasshoppers, flies and other North American insects exclusive of the butterflies, moths and beetles, with full life histories, tables and bibliographies. Insectes; Insects. The Scale Iniecta the tree which seem to be seriously affected. Older twigs, how- ever are also attacked, and many specimens of the insect may be found upon the trunk. As soon as the young insect finds a suitable position it gradually inserts its beak and commences to grow through the influence of the healthy food sap which it pumps up. Almost immediately, also, the secretion of scale begins. This is first noticed in the form of a white, waxy powder which first is seen in the form of threads, but which soon becomes homo- geneous. In a few days the first molt takes place, not as in the ordinary manner with insects by a series of contractions and exten- sions which work the old skin to the end of the body, from which it is finally freed, but by a sort of loosening and shrinking of the body underneath, all the parts except the proboscis being shed and abandoned with the skin. Strengthened by the secretions from the body, this skin forms the first scale. Presently the skin is shed a second time and mingles with the second secretion, which forms the second scale, which may be noticed at the anterior end of the completed scale of the old individual. As growth continues this second scale becomes too small and is 'I'i. Fig, 152.—The scurfy bark-louse of lliu apple, Chimaspis furfurus. ( Aut/ior^s illuitratton. ) lifted up into the third portion, while the shield proper is secreted by a series of increments, more being constantly added on behind as the insect beneath grows. When full grown the female is ready for reproduction. 1 he male scale is a perfectly distinct 257. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1901
