Report of the United States Entomological Commission

Report of the United States Entomological Commission

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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. 1878 edition. Excerpt: ...laid in September, 1876, began to hatch about April 10th. Very cold weather April 24 to 29. Many eggs began to hatch rapidly on May 1st. Insects exposed in a bottle to 14, were not injured.--G. V. Swearingen, Sidney, Iowa, May 1, 1877. On the 27th May, 1877, at Montevideo, Chippewa County, I found a place where the batching had begun in the early part of the month and had been suddeuly arrested by rain; the egg-pods were found to be spreading, the young having been arrested just as they were in the act of breaking the shell. The eggs appeared to be lifeless, but after lying in the warm sun a few minutes a portion of the young came forth. - - Eggs plowed under in the spring in corn-fields remained uuhatched until June 21, and were then apparently lifeless, but hatched nnder the sun within an hour. Where the ground has become baked hard by the sun, a light rain-shower, followed by warm sunlight, often serves to assist rather than to hindor hatching.--Mr. Allen Whitman, Saint Panl, Minn. Eggs deposited Jnly, 1875, and covered by water through the spring and summer to August first, were hatching out on August 28 in the warm sun. Alternate freezing and thawing occur every year; thus March, 1874, had sixteen days of temperature above 32, aud it fell, April 3, to 17. In March, 1875, ranged from 38 to 1, and in April, 1875, the range was from 57 to 10. In March, 1877, above freezing-point, and ou eighteen days in April.--C. H. Goodsell, Marshfield, Lincoln County, Minn. Notwithstanding the indefinite nature of some of the preceding observations, wo have ventured to draw the following conclusions iu reference to the influence of temperature, &c, on the vitality and hatching of the eggs: I. Low degrees of cold, as--5 F. and--24 F., do not...
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Product details

  • Paperback | 452 pages
  • 189 x 246 x 23mm | 803g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236527313
  • 9781236527318