On the natural history of the Rocky Mountain locust and on the habits of the young or unfledged insects as they occur in the more fertile country in which they will hatch the present year.
Bulletin (United States. Entomological Commission) ; no. 2.
United States Entomological Commission.
Geological and Geographical Survey of the Territories (U.S.)
Washington : G.P.O., 
1 En8B no. 2 1877
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