. Elementary entomology. Insects. FIG. 101. Rocky Mountain locust laying eggs rt, females ovipositing, with earth cut away to show tip of abdomen placing eggs at d, and completed egg mass at c; c, eggs. (After Riley) in color, but the hind-wings are black, with a broad yellow edge quite conspicuous in flight. Throughout the Mississippi Valley the differential locust (Melanoplus diffcr- cntialis) is one of the most destructive forms, being particu- larly injurious after floods, when it multi- plies rapidly on the un- cultivated land which has been flooded. A generation ago (1874 -1877), the cro
. Elementary entomology. Insects. FIG. 101. Rocky Mountain locust laying eggs rt, females ovipositing, with earth cut away to show tip of abdomen placing eggs at d, and completed egg mass at c; c, eggs. (After Riley) in color, but the hind-wings are black, with a broad yellow edge quite conspicuous in flight. Throughout the Mississippi Valley the differential locust (Melanoplus diffcr- cntialis) is one of the most destructive forms, being particu- larly injurious after floods, when it multi- plies rapidly on the un- cultivated land which has been flooded. A generation ago (1874 -1877), the crops of the western part of the Mississippi Val- ley were utterly de- stroyed for several years by the clouds of Rocky Mountain or migratory locusts (Melanoplns spretns] which swooped down from the tablelands of the northwest, where they bred and mul- tiplied. Accounts of the numbers and voracity of these locusts seem almost incredible to-day, except to those who have seen an occasional outbreak in the northwest, for with the set- tling and development of the western plateau they have become less abundant, and are now injurious only in Minnesota, the Dakotas, and Manitoba. In the mid- FIG. 102. The Carolina locust {Dissosteira die and Southern States the Carolina], female. (Slightly enlarged) large bird grasshopper, or (After Lugger). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Sanderson, Dwight, 1878-1944; Jackson, C. F. (Cicero Floyd), b. 1882. Boston, New York [etc. ] Ginn and Company
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