Philippine Wasp Studies; PT. 1. Descriptions of New Species

Philippine Wasp Studies; PT. 1. Descriptions of New Species

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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. 1919 edition. Excerpt: ... smoother than the sides. The length of Paragem7a's life-cycle was not determined, save that, barring accidents, the mother lives to see at least a good part of her progeny issue from the cocoons and cells. The wasp grub hatching from the egg, proceeds to consume the paralyzed spider; in a few days it is full grown, having devoured practically the whole of her prey, and spins a thin yellowishbrown cocoon, tapering at one end and rounded at the other. As in Pseudagenia and Macromeris, the cocoon, about 19 mm. long, is secured to the inside of the cell by its tapering end, and also supported elsewhere by strands of silk. The pupa is an interesting object. It much resembles that of Macromeris, but in addition to the lateral Y-shaped processes of the abdomen, bears a forked thorn and two successive knobs on the back of the thorax and three pairs of thorns on the top of the head. There are also thorns near the base of the antennae. The cocoon and pupa lie in the long axis of the cell. The wasp in escaping from the cell bites a small hole through the cap. If this cell happens to be needed by one of the mothers of the colony, the debris is removed from it and the emergence hole, made by its former inhabitant, neatly enlarged and rounded off so that it has the appearance of an unused cell. The bits of mud bitten off in this work are not cast aside, but plastered on the cell's walls, where they will come in ha.n for recapping the cell after another spider is stored in it. It is probable that the wasps use any cell in the nest they find vacant and do not concern themselves about its builder. The operations as related above are frequently rendered more complex or irregular through the erratic behavior of one or more of the female wasps....show more

Product details

  • Paperback | 68 pages
  • 189 x 246 x 4mm | 141g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236841646
  • 9781236841643