Guide to the Study of Insects and a Treatise on Those Injurious and Beneficial to Crops; For the Use of Colleges, Farm-Schools, and Agriculturists Volume . 1

Guide to the Study of Insects and a Treatise on Those Injurious and Beneficial to Crops; For the Use of Colleges, Farm-Schools, and Agriculturists Volume . 1

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 edition. Excerpt: ...silken lustre. The. larger genera, Hypena and Herminia, etc., are culled Deltoids, as when at rest the wings form a triangle of the form of the Greek letter Delta. Their antenna: are sometimes pectinated in the male. They are usually gregarious in their habits, and often extremely local. They haunt moist grassy places, are readily disturbed by day, and fly before dusk, while some are ' true day-fliers. The larvae are generally known by their remark ably glassy appearance, and the few hairs on them have an unusually bristly look. Many spin a cocoon., The pupa is long, slender, and conical. The largest form is Hypena, in which the male antennae are hairy, and the palpi are long, ascending, and the fore legs are not tufted, and there are often slight tufts of raised scales on the fore wings. The larva is elongate, cylindrical, with fourteen legs, and feeds on low or climbing plants, making a slight cocoon among leaves. The Hop vine moth, H. lmmuli Harris (Fig. 250; a-, larva and pupa) is very destructive to the hop. It is marbled with gray beyond the middle of the fore wings, with a distinct oblique gray spot on the tip; they are crossed by two wavy blackish lines formed of elevated black tufts, and there are two similar tufts in the middle of the wings; it expands one inch and a quarter. The larva is glassy peagreen. The body is long and slender, with rather convex rings, and with long sparse hairs. The head is rather large and deeply divided into two lobes by the median suture; it is a little more yellowish green than the body, which tapers gradually towards the tail, while the anal legs are long and slender, there being but two pairs of abdominal legs, so that the caterpillar walks with a looping gait. The body is striped with a narrow whitish...show more

Product details

  • Paperback | 236 pages
  • 189 x 246 x 13mm | 426g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236485815
  • 9781236485816