. 1st report of Dr. Fitch on the noxious, beneficial and other insects, detrimental to agriculture, made to the New York State Agricultural Society. Beneficial insects; Insect pests; Insects. APPLE-ROOT BLIGHT INSECT DESCKIBED. 9 until autumn, when winged individuals are developed, which leave their retreat, and coming abroad into the open air, copu- late, and search out new situations in which to plant their species. Others, as I infer from the lateness of the season when I found young lice upon the excrescences, remain in their abode through the winter, to continue their operations upon the
. 1st report of Dr. Fitch on the noxious, beneficial and other insects, detrimental to agriculture, made to the New York State Agricultural Society. Beneficial insects; Insect pests; Insects. APPLE-ROOT BLIGHT INSECT DESCKIBED. 9 until autumn, when winged individuals are developed, which leave their retreat, and coming abroad into the open air, copu- late, and search out new situations in which to plant their species. Others, as I infer from the lateness of the season when I found young lice upon the excrescences, remain in their abode through the winter, to continue their operations upon the same roots the following yeat. ThS young larva, as appears from the hasty notes and sketch which I was able to take whilst they were still alive, were scarcely four hundredths of an inch in length, of an oval form and a pale dull yellow color. Their legs were â shortishj robust, and nearly equal in length. The antennae ap- peared mueh like a fourth pair of legs, being robust, and about the same length as the legs; they seemed to be five-jointed, the joints successively diminishing in diameter, the one next to the last being longest. From the tip of the abdomen of each of these young lice protruded a white filament, or short thread of flocculent cotton-like matter, variously curled and crinkled in different individuals. The whiteness of this filament rendered it perceptible to the naked eye, and served to show the situation of the insect as it moved about upon the surface of the excrescence, when otherwise it would have been whoUy invisible. The mature winged individuals are nearly or quite a quarter of an inch in length to the tips of the closed wings, and these, when spread, measure thirty-eight hund- dreths of an inch across. The body, legs and antennae are coal black; the antennae are about half the length of the body, and the head and abdomen on its back are covered with a dense mass of snow white or bluish white flocculent down. The upper wings are transparent and slightl
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectb, booksubjectinsects
