Technical Series Volume 10-16

Technical Series Volume 10-16

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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: ...Style slightly constricted in the middle. Measurements: Expanse of wings, 5.744--6.477 mm.; length of body, 1.641 mm.; width, 0.734 mm.; antenna, I, 0.065 mm.; II, 0.065 mm.; III, 0.277 mm.; IV, 0.196 mm.; V, basal, 0.147 mm.; filament, 0.293 mm.; total, 1.043 mm.; style, 0.088 mm. OVIPAROUS GENERATION. Before first molt and 24-48 hours old, male or femaZe.--Color sulphui-yellow. Head with a dark patch covering it almost entirely. Eyes red. Antennae and legs transparent until a day old, gradually darkening until they become concolorous with the darker markings of the body. Antennae apparently only 4-segmented, a constriction in the apical half of the third segment showing where this segment later divides into two. At the distal end of the third segment is a distinct sensorium, while at the apex of the thickened base of the fourth are one or more indistinct sensoria. Thorax with dark patches covering about one-half of the dorsal surface. Abdomen with dark markings which appear only after the aphis is at least one day old. Abdomen with 4 distinct dorsal rows of tuberculate spines, 2 on either side of the median line, and at least 1. lateral row on each side. At the base of each of these spines is a small darkened area. The small indistinct cornicles are surrounded with dark circular patches. The opening also is marked by a dark ring. Measurements: Length of body, 0.763 mm.; width, 0.362 mm. Female after second molt and 7 01' 8 days 0ld.--General color light apple-green. Antennae lighter than body color excepting second segment and tip of last segment. Spine spots bice-green in color. Tarsi black. Measurements: Length of body, 1.331 mm.; width, 0.581 mm.; antenna, 0.537 mm. Female after third m0lt.--General color apple-green, becoming paler...show more

Product details

  • Paperback | 230 pages
  • 189 x 246 x 12mm | 417g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236861388
  • 9781236861382