 | Sir Norman Lockyer - Electronic journals - 1879 - 622 pages
...present summer, he has been able to trace the life-history of those species producing galls on our own elms, and to show that they all agree in this respect,...gall-inhabiting colony the ensuing spring. Thus the analogy in the life-history of the Pemphigince and the Phylloxerina is established, and the question... | |
 | Spencer Fullerton Baird - Industrial arts - 1879 - 788 pages
...past summer, he has been able to trace the life history of those species producing galls on our own elms, and to show that they all agree in this respect,...issue therefrom being the stem-mother which founds the gall-producing colony the ensuing spring. " Thus the analogy in the life history of the Pemphigince... | |
 | American Association for the Advancement of Science - Science - 1879 - 454 pages
...present summer, he has been able to trace the life-history of those species producing galls on our own elms, and to show that they all agree in this respect,...trunk of the tree, and there hibernates — the issue from it being the stem-mother which founds the gall-inhabiting colony the ensuing spring. Phylloxerce... | |
 | American Association for the Advancement of Science - Science - 1879 - 446 pages
...present summer, he has been able to trace the life-history of those species producing galls on our own elms, and to show that they all agree in this respect,...trunk of the tree, and there hibernates — the issue from it being the stem-mother which founds the gall-inhabiting colony the ensuing spring. Thus the... | |
 | 1880 - 1104 pages
...summer (1878), I have been able to trace the life-history of those species producing galls on our own Elms, and to show that they all agree in this respect,...Thus the question as to what becomes of the winged insecte after they leave the galls is no longer an * DicLebensgeschichte der auf Uhnus campestrie vorkommenden... | |
 | American Association for the Advancement of Science - Science - 1879 - 446 pages
...present summer, he has been able to trace the life-history of those species producing galls on our own elms, and to show that they all agree in this respect,...consigned to the sheltered portions of the trunk of tjie tree, and there hibernates — the issue from it being the stem-mother which founds the gall-inhabiting... | |
 | American Association for the Advancement of Science - Science - 1879 - 452 pages
...the life-history of those species producing galls on our own elms, and to show that they all agree iu this respect, and that the impregnated egg produced...trunk of the tree, and there hibernates — the issue from it being the stem-mother whichP founds the gall-inhabiting colony the ensuing spring. Thus the... | |
 | Ernest Ingersoll, William Cornelius Wyckoff - Science - 1878 - 406 pages
...trace the life history of those producing galls on our elms, and ascertaind that the impregnated egg is consigned to the sheltered portions of the trunk...stem-mother* which founds the gall-inhabiting colony of the ensuing spring: thus settling the question as to what becomes of the winged insects after they... | |
 | Ernest Ingersoll, William Cornelius Wyckoff - Science - 1878 - 422 pages
...being the stem-mother* which founds the gall-inhabiting colony of the ensuing spring: thus settling the question as to what becomes of the winged insects after they leave the galls. They instinctively seek the bark of the tree and there give birth to the sexual individuals, cither... | |
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Continuing his observations, especially during the present summer, he has been able to trace the life-history of those species producing galls on our own elms, and to show that they all agree in this respect, and that the impregnated egg produced by the... 