The Rice Bug (Leptocorisa Varicornis, Fabr.)

The Rice Bug (Leptocorisa Varicornis, Fabr.)

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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. 1908 edition. Excerpt: ...X1, figs. 9, 10; they then measure about 3'5 mm. by 2'5 mm., and continue to grow till they measure from 4 to 6 mm., there being great variation in this respect in the individuals of one brood hatched from one set of eggs. The legs remain functional throughout life;the mature female is shown in Plate Xl, fig. l I, magnified five times. After the second moult, the males develop no wax, are flattened and yellow, with longer legs and antennae and with larger eye spots; they gather together in a group, always close to where they moulted, and secrete a cloud of white waxy 'cotton, which envelops them. (Plate XI, fig. 8.) The legs and antennae are then folded and the insect's wingpads form on the dorsal surface; the body shrinks, the segments become more clearly marked and the definite chrysalis form is assumed; this is shown in Plate X1, figs. 4 and 5. The resting period lasts for about nine days. The insect can move the legs and antennae to some extent, and if disturbed even moves about a little: at the end of this period of rest, a very thin pellicle is shed and the fully developed winged male emerges. The winged male is shown in Plate XI, fig. 6, much magnified. The compound eyes project noticeably from the head; there are no mouth parts; the antennae are I8-jointed; there are two small processes at the apex of the abdomen, each with a few long hairs; there is no conspicuous penis as in many male Coccidae. The wings are connected at the base to the hooked process arising from the side of the metathorax. From the time of the second moult, the males cease to feed; they are helpless as pupae and as adults they live only _to fertilise the females. The act of mating could not be observed; they remained motionless by day and more

Product details

  • Paperback | 68 pages
  • 189 x 246 x 4mm | 141g
  • United States
  • English
  • black & white illustrations
  • 1236824784
  • 9781236824783