. Natural history of animals. Containing brief descriptions of the animals figured on Tenney's Natural history tablets, but complete without the tablets. Zoology. 166 ARTICULATES: INSECTS. HESSIAN FLY AND WHEAT FLY. The Hessian My expands only about one fourth of an inch, and has the head, antennae, and thorax black, the wings black- \ \i i ^^^ ^^^ fringed with short hairs. The hind body is tawny, with black on each ring, the legs brownish, and feet black. Two broods appear in a year, — one in spring and one in au- tumn. The females lay their eggs on the young blades of wheat, both Fig. 291. —
. Natural history of animals. Containing brief descriptions of the animals figured on Tenney's Natural history tablets, but complete without the tablets. Zoology. 166 ARTICULATES: INSECTS. HESSIAN FLY AND WHEAT FLY. The Hessian My expands only about one fourth of an inch, and has the head, antennae, and thorax black, the wings black- \ \i i ^^^ ^^^ fringed with short hairs. The hind body is tawny, with black on each ring, the legs brownish, and feet black. Two broods appear in a year, — one in spring and one in au- tumn. The females lay their eggs on the young blades of wheat, both Fig. 291. —Hessian ny. in spring and fall. The eggs are only about one fiftieth of an inch in length, pale red, and they hatch in about four days, producing pale red maggots. The larvae immediately crawl down the leaf till they come to a joint. Here they rest a little below the surface of the ground till they have imdergone their transformations. They injure the plant by sucking its sap. The larvae reach their growth in five or six weeks, and are then covered with a hardening brown or chest- nut-colored skin, and the insect is then said to be in the flax-seed state, from its resemblance to a flax-seed. In April and May they complete their transformations, and come forth in the winged state, and soon begin to lay their eggs iipon the spring wheat, and upon that sown the autumn before. The maggots hatched from these eggs pass down the stem as before stated, take the flax- seed form in June or July, and in autunui most of them are transformed into winged insects; others remain through the winter, and are transformed in the spring, as before stated. These flies sometimes move in im- mense swarms in search of fields of their favorite grain where they may lay their eggs. The Hessian Fly re-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble t
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1875
