Report on the Noxious and Beneficial Insects of the State of Illinois Volume 23

Report on the Noxious and Beneficial Insects of the State of Illinois Volume 23

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...a rather small species (Fig. 127), about an inch long to the tips of the closed wings, which are conspicuously marked with large dark spots, with yellowish brown spaces between. The back of the closed wings is bordered each side by a yellowish stripe. The eggs are laid in the ground in fall in the usual podlike masses, about twenty or thirty in each mass. They hatch late in May and in June, and the adult stage is reached in the North about July 1. Fig. 127. The Clear-winged Twice natural size. Grasshopper, Camnula pellucida. The Bird Grasshoppers. Schistocerca americana Dru. Schistocerca alutacea Harr. These immense grasshoppers, two or three inches long to the wing tips, are much the largest in Illinois. They are common only in the southern half of the state and in the southern part of the country gener Fig. 128. The Common Bird Grasshopper, Schistocerca americana. Slightly enlarged. ally. They feed freely on the leaves of corn, but as they develop late in the season their injuries, even when severe, reduce the yield but little except for fodder. Schistocerca americana (Fig. 128) is very similar to the dreaded migratory locust of the Old World and is closely related to it. It never becomes excessively abundant, but occasionally moves short distances in swarms or nights in search of food. Both these grasshoppers are brown, with a central pale stripe, usually conspicuous the whole length of the back, but americana is larger and darker brown, with pale stripings on the head and thorax, and the wings heavily spotted with dark brown on a nearly transparent ground. Alutacea (Fig. 129) is a nearly uniform red-brown throughout, except for the central stripe. Injury is done to corn by eating the leaves, and to some extent also the husks and silk, more

Product details

  • Paperback
  • 189 x 246 x 6mm | 227g
  • United States
  • English
  • black & white illustrations
  • 1236945573
  • 9781236945570