Report on the Noxious and Beneficial Insects of the State of Illinois Volume 12-14

Report on the Noxious and Beneficial Insects of the State of Illinois Volume 12-14

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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. 1883 edition. Excerpt: ... neck. All the margins of the pronotum are commonly white. The side of the prothorax is yellow, with two very broad, longitudinal black bands, which unite in front but do not quite reach the margin behind. The side-pieces of the meso-and meta-thorax are dusky with yellow edges, and the coxse are dusky externally; in pale specimens both these and the side1pieces are concolorous. In such specimens, the yellow of the thorax often predominates, being then marked with six longitudinal black stripes, more or less complete. The scutellum is hairy, and transversely rugose. It is ordinarily black, with a Y-shaped mark, the short stem of which reaches the tip of the scutellum, while its lateral arms enclose a triangular black patch between them, and leave a narrow black stripe outside. The extreme margin of the scutellum is yellow. Sometimes the included triangle is longitudinally divided by a narrow black line; and in dark specimens the Y-shaped white mark is often reduced to a triangle of three white points. The wing covers are sparingly pubescent with yellow hair, and coarsely and closely punctured, the punctures being more or less confluent, so as to give the surface a rugose appearance. They are so irregularly and variably mottled with dusky and yellowish as to defy definite description. The regions most likely to be decidedly darkened are the posterior part of the cerium and the middle of the clavus, opposite the tip of the scutellum. The cuneus is usually yellow, with a black dot at its tip, and often with two others at the basal angles. The hemelytra may, however, be almost wholly black, or reddish black, with, perhaps, a narrow pale stripealong the middle of the corium. The membrane is always clouded, at least, with dusky. The abdomen more

Product details

  • Paperback
  • 189 x 246 x 14mm | 472g
  • United States
  • English
  • black & white illustrations
  • 123683416X
  • 9781236834164