Bulletin Volume 125-132

Bulletin Volume 125-132

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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. 1910 edition. Excerpt: ...of the nut. The egg is pellucid white and its form may be eliptical, oval or pyriform. In one example the dimensions were;---length, .025 inch, width, .015 inch. The time required for the egg to hatch was not determined and the larvae was not differentiated from those of the other species with which it associates. The Straight-snouted Acorn Weevil, Balaninus orthorhynchus Chittn. This is one of our common species on biennial oaks. I have found it in about equal numbers on red, scarlet and black oaks but have never found it on the annuals. This species has been recorded from West Virginia and Texas only. It was first described in 1908 by Dr. Chittenden. The color is dull, yellowish brown in fresh specimens and dark, reddish brown where the vestiture is rubbed off. There are usually numerous spots of lighter color on the back but these are very small and indistinct. The female is three-tenths of an inch in length and the snout, which is straight with the exception of a very slight curve near the point, is the same length as the body. The male averages distinctly smaller than the female and the snout is only half as long as the body. The beetles are found on the trees from about the middle of August until the acorns drop in the fall. In preparing a place in the acorn for her egg, the female has the peculiar habit of beginning her puncture on the side of the little tip or beak that projects at the apex of the nut. In more than thirty acts of egg laying that I have recorded this rule has not been departed from. The hole is drilled from the side of this beak directly to the kernel and at that point branches and extends between the kernel and shell as deep as the length of the snout will permit. After each branch of the egg-gallery is completed an.show more

Product details

  • Paperback | 74 pages
  • 189 x 246 x 4mm | 150g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236749154
  • 9781236749154