. Histoire naturelle des animaux ;. Zoologie. 170 arthropodes : INSECTES.. année, - une au printemps et une en automne. Les femelles pondent leurs œufs sur les jeunes, les deux lames de blé au printemps et en automne. Les oeufs sont seulement environ un cinquantième d'un pouce de longueur, rouge clair, et qu'ils éclosent après environ quatre jours, produire des asticots rouge pâle. Les larves ramper immédiatement vers le bas la feuille jusqu'à ce qu'ils viennent d'une articulation. Ici on reste un peu au-dessous de la surface du sol jusqu'à ce qu'ils ont subi leurs transformations. Ils blessent l'usine en suçant la Fig.291.-mouche de Hesse.^j g g^p. L'larvse atteindre leur croissance en cinq

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. Natural history of animals;. Zoology. 170 ARTHROPODS : INSECTS.. year, — one in spring and one in autumn. The females lay their eggs on the young blades of wheat, both 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, pro- ducing 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 undergone their transformations. They injure the plant by sucking Fig.291.-Hessian Fly. j^g g^p. The larvse reach their growth in five or six weeks, and are then covered with a hardening, brown or chestnut-colored skin, and the insect is then said to be in the flaxseed state, from its resem- blance to a flaxseed. In April and May they complete their transformations, come forth in the winged state, and soon begin to lay their eggs upon 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 flaxseed form in June or July, and in autumn most of them are transformed into winged insects ; others remain in the ground through the win- ter, and are transformed in the spring, as before stated. These flies sometimes move in immense swarms in search of fields of their favorite grain where they may lay their eggs. The Hessian Fly received its name from the incorrect belief that it was brought to this country in straw by Hessian troops at the time of the Revolutionary War. The American Wheat Fly is about one tenth of an inch long, orange-colored ; wings transparent, eyes black. 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 the original work.. Tenney, Sanborn, 1827-1877; Tenney, Abby Amy Gove, 1836-. New York, Cincinnati [etc. ] American book Co

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