The American Entomologist: An Illustrated Magazine of Popular and Practical Entomology, Volumen3Hub Publishing Company, 1880 |
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The American Entomologist: An Illustrated Magazine of Popular and ..., Volumen3 Vista completa - 1881 |
The American Entomologist: An Illustrated Magazine of Popular and ..., Volumen1 Vista completa - 1869 |
The American Entomologist: An Illustrated Magazine of Popular and ..., Volumen1 Vista completa - 1868 |
Términos y frases comunes
A. J. Cook abdomen abundant Aletia American Entomologist antennæ appearance apple bark beetle birds Boll borer boring brood bugs butterflies C. V. Riley cabbage caterpillars cave cent chrysalis Cicada cocoon Coleoptera color Cotton Worm crop destroyed destructive Diptera dorsal eggs elytra Entomological Entomologist experiments fact feeding female Fitch flies flowers fungus galls genus Gracilaria grape ground grubs habits Hagen hairs hatched head Hessian Fly hibernation imago inch infested injurious insects joints June known labium large numbers larva larvæ leaf leaves legs Lepidoptera Lithocolletis locust maggots mandibles maxillæ moth natural observed Orthoptera ovipositor pale palpi parasites Paris green pest Phylloxera plants powder Prodoxus Prof Pronuba published pupa pupæ Pyrethrum Report season segments side silk species specimens spots spring thorax tion trees twigs vines wheat wings winter young
Pasajes populares
Página 121 - it fastens, lengthwise and head downwards, to the tender stalk, and lives upon the sap. It does not gnaw the, stalk, nor does it enter the central cavity thereof ; but as the larva increases in size, it gradually becomes imbedded in the substance of the stalk. After taking its station, the larva moves no more, gradually loses its reddish...
Página 129 - ... grubs, caterpillars, maggots, etc.) should be packed alive in some tight tin box — the tighter the better, as air-holes are not needed — along with a supply of their appropriate food sufficient to last them on their journey ; otherwise, they generally die on the road and shrivel up. Send as full an account as possible of the habits of the insect respecting which you desire information ; for example, what plant or plants it infests ; whether it destroys the leaves, the buds, the...
Página 179 - All inquiries about insects, injurious or otherwise, should be accompanied by specimens, the more the better. Such specimens, if dead, should be packed in some soft material, as cotton or wool, and inclosed in some stout tin or wooden box. They will come by mail for one cent per ounce. Insects should never be inclosed loose in the letter. Whenever possible, larvae (ie, grubs, caterpillars, maggots, etc...
Página 140 - November, or from thirty to forty days after the wheat is sown, they assume the " flax-seed" state, and may, on removing the lower leaves, be found as little brown, oval, cylindrical, smooth bodies, a little smaller than grains of rice. They remain in the wheat until during warm weather. In April the larva rapidly transforms into the pupa within its flax-seed skin, the fly emerging from the flax-seed case about the end of April. The eggs laid by this first or spring brood of flies soon hatch ; the...
Página 45 - The extract is easily obtained by taking a flask fitted with a cork and a long and vertical glass tube. Into this flask the alcohol and Pyrethrum are introduced and heated over a steam tank or other moderate heat. The distillate...
Página 292 - If the trees stand on the sidewalk of the streets the larvae will go for putation in the cracks between the bricks or at the base of the tree where they can also be killed in the same way. This mode of destruction is, take it all in all, the next most satisfactory one we know of, though it must be frequently repeated. (2) We have largely experimented with a view of intercepting and destroying the larvae in their descent from the tree.
Página 198 - Canada, reported at the meeting of the Entomological Club of the American Association for the Advancement of Science...
Página 87 - ... •'•March 7, 1865. — The snow having cleared off from the ground, I examined the condition of a host of these chinch-bugs that had chosen for their winter covering cord-wood sticks lying on the ground, entirely surrounded by frost and ice; of these 20 per cent. were living; those that were more fortunate in their selection of winter quarters fared much better. From a single handful of leaves picked up at one grasp from beneath an apple tree, I obtained 355 living and...
Página 186 - It pays to add two or three pounds of flour or starch to each barrel of the poison mixture, not only because of the greater adhesiveness which they give to the poison, (a very desirable object, especially in wet weather,) but because by their color they help to indicate the quantity that has been distributed, and also because they serve to keep the poisons suspended in the water.
Página 291 - He also propounds the following query : (3) Do the beetles hybernate in the ground so that they can be poisoned, or are they perpetuated only by the eggs on the trees? Allow me to add the following subjects for investigation as necessary to the devising of proper remedies against this foreign invader. (4) How soon do the insects appear in the Spring, how rapidly do they propagate, and what time is passed in each stage of development?