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Страница 15 - ... to conduct original researches or verify experiments on the physiology of plants and animals ; the diseases to which they are severally subject, with the remedies for the same ; the chemical composition of useful plants at their different stages of growth; the comparative advantages of rotative cropping as pursued under a varying series of crops; the capacity of new plants or trees for acclimation; the analysis of soils and water; the chemical composition of manures, natural or artificial...
Страница 15 - That it shall be the object and duty of said experiment stations to conduct original researches or verify experiments on the physiology of plants and animals ; the diseases to which they are severally subject, with the remedies for the same ; the chemical composition of useful plants at their different stages of growth ; the comparative advantages of rotative cropping as pursued under a varying series of crops ; the capacity of new plants or trees for acclimation ; the analysis of soils and water...
Страница 15 - Resolved, That the thanks of this association are due, and are hereby tendered, to the Fire Department of the city of Detroit, for the.
Страница 90 - ... thighs a little dilated. Length less than three-twentieths of an inch. I took a single specimen on the Eastern Shore of Virginia.
Страница 90 - ... and the head is relatively broader and more rounded, while the joints of the body are subequal, the prothoracic joint being but slightly longer than any of the rest. The red color soon pervades the whole body, except the first two abdominal joints, which remain yellowish, and the members, which remain pale. After the...
Страница 90 - ... extend almost across the two pale abdominal joints, which are now more dingy, while the general color of the abdomen is dingy gray; the body above is slightly pubescent, the members are colored as in the mature bug, the three-jointed tarsus is foreshadowed, and the dark horny spots at the tip of the abdomen, both above and below, are larger.
Страница 90 - After the second molt (fig. 3,/) the head and thorax are quite dusky; the abdomen duller red, but the pale transverse band is still distinct; the wing pads become apparent; the members are more dusky; there is a dark-red shade on the fourth and fifth abdominal joints, and ventrally a distinct circular dusky spot covering the last three joints. In the last-stage larva or nymph (fig. 3, g), sometimes called the ',pupa...
Страница 124 - She first spreads out to their full extent all of her legs, braces them, and then draws her beak or rostrum to as nearly a perpendicular position as possible, then by gnawing and with a twisting motion soon works her snout into the young fruit until it is buried a trifle above the bases of the antennae, the latter being held close against and directed upward along the rostrum upon the head while the hole is being made. She now draws out her beak and deliberately turns about, and after a few preliminary...
Страница 130 - Whenever possible, larvae (;'. e. , 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...
Страница 92 - I thought that a good opportunity and an inviting field was presented to purposely spread a disease — an act not usually considered a very kind one to engage in, and one not to be recommended to physicians. This was exceedingly simple, as all that was necessary was to gather a number of the diseased bugs, put them into tight-fitting tin boxes, and mail them to regions infested by chinch bugs.

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