Assertion: rocky mountain locust | /r/HasProperty | melanoplus spretus
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Source sentences:
text: Rocky Mountain locust (Melanoplus spretus)
text: The Rocky Mountain locust, Melanopolus spretus, a species that is now apparently extinct, destroyed millions of dollars worth of crops on the Great Plains between 1874 and 1877.
text: The role of the Rocky Mountain locust (Melanoplus spretus) in the Grasshopper Plague of 1874 (which is also known as the Great North American Locust Plague), and the insect's mysterious disappearance that followed.