Comentarios de la gente - Escribir un comentario

No encontramos ningún comentario en los lugares habituales.

Otras ediciones - Ver todas

Términos y frases comunes

Pasajes populares

Página 187 - Canada, reported at the meeting of the Entomological Club of the American Association for the Advancement of Science at...
Página 31 - Pennsylvania, and in 1815 returned to his native place, where he practised medicine for two years and a half, devoting all his leisure moments to the study of natural science, for which he had developed a passion which influenced all his after life. He next removed to Durham, Conn., where he enjoyed an extensive practice for several years, when the death of his wife and child again unsettled him, and he removed to Poland, Conn.
Página 212 - ... to compensate for their paucity in number. Your Council entertain the hope that at no distant day our membership will be augmented by the addition of at least a few more students of our useful and interesting branch of natural history. Twelve meetings were held during the year, at which the following papers were read and presented to the Society : GJ Bowles—" List of Eggs and Larvae Described in the Seven Volumes of the CANADIAN ENTOMOLOGIST.
Página 179 - Manuscript Notes from My Journal: Cotton and the principal insects, &c., frequenting or injuring the plant in the United States, by Townend Glover.
Página 84 - ... Descriptions, and if possible, figures of such mechanical contrivances as have proved useful in your locality for the destruction of either the young or the winged insects. 19. If your section was not visited in 1876, please state this fact. 20. If visited any previous year, please give the dates. 21. To what extent have birds, domestic fowls, and other animals, domestic or wild, been useful in destroying these insects ? As the successful prosecution of this work is as deeply important to the...
Página 32 - Edinburgh on the igth of February, 1812, where he resided until 1860. In his early years he manifested a fondness for natural science which strengthened as he matured. He was educated for the law, and subsequently devoted some attention to the study of medicine. During the last few years of his life in Edinburgh he labored hard in the interests of science ; in 1858 he was elected President of both the Botanical Society and Physical Society, and just previous to his removal to London he contributed...
Página 161 - ... and four abdominal or false feet, besides anal claspers. This larva, eating on the inner side of the bark, and making furrows in the wood, causes the bleeding which, when the depletion is excessive or continuous, and especially in the case of young trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of exuding pitch, which seems to act as a protection to both the larva and the chrysalis.
Página 162 - W-shaped or dentate. The outer line at apical fourth is once more strongly indented below costa. The black component lines do not seem to be more distinct on one side than on the other of the pale included bands or spaces. The median field is blackish, becoming pale towards the outer line ; it shows a pale, sometimes whitish cellular spot, surmounted with raised scales. It can be seen that these raised scales (easily...
Página 67 - Under surface much paler, color dull pale pinkish green, the pink color predominating from 5th to terminal segments inclusive, and with a number of very minute raised yellowish dots placed chiefly along the sides. Feet black ; pro-legs pink, with a patch of black on the outside of each.
Página 225 - Thus the caterpillar skin ascends, its plaits are pushed nearer and nearer together, and it is soon reduced to a packet so small that it covers only the end of the tail of the chrysalis (Fig. 106). But here comes the culminating point, the most difficult part of the operation. The chrysalis, which is shorter than the caterpillar, is at some distance from the silky...

Información bibliográfica