. 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 Gall-KJiea r.^ ^'^f thiit »â ..⢠:, vubs foiinJ within it were tht'result of spontaneous fe't""^' 'i^i' it supposed -hat jjalls were caused by the punci . isccts and the injection of a poisonous liquid. With th' true !i 's, however, the f;all .ippar- ently does not commence to form until after the cg^ hatches. It is .suppos
. 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 Gall-KJiea r.^ ^'^f thiit »â ..⢠:, vubs foiinJ within it were tht'result of spontaneous fe't""^' 'i^i' it supposed -hat jjalls were caused by the punci . isccts and the injection of a poisonous liquid. With th' true !i 's, however, the f;all .ippar- ently does not commence to form until after the cg^ hatches. It is .supposed tiiat the larva secretes a liquid which causes the abnormal growth of plant, the plant cells which are most active m growth and subdivision being directly affected. The egg of the gall- tly is slender, and has a very long petiole which is six to ten times the length of the egg body, and this is inserted by means of a very long curiously formed ovi- positor. A good account of the method of ovipo- sition reported by Riley from observations made by Pergande will be found in the Proceedings of the Hntomological Society of Washington (Vol. III. pp. 260-2(3;). Most of the Cynipokis make galls upon oak. Others, how- ever, are found upon rose bushes. All parts of the plant are affected - roots, stems, twigs and leaves, as well as leaf petioles. In .some galls but a single larva develops, while in others very many develop. The oak galls of commerce are European galls, but some of our native galls would undoubtedly be found to possess commercial value through the quantities of tannin they possess. The origin of tannin in galls has been the subject of 51. Kig jS.âi)ia.'.tro|)lnis iiuhulosjs. ( After Kdcy. I i.: ;l %.. 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 Howard, L. O. (Leland Ossian),
Size: 1250px × 1998px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1901
