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leafhopper

(Encyclopedia)leafhopper, common name for small, wedge-shaped leaping insects, cosmopolitan in distribution, belonging to the family Cicadellidae, which comprises some 5,500 species of insects. Some are brightly co...

Preemption Act

(Encyclopedia)Preemption Act, statute passed (1841) by the U.S. Congress in response to the demands of the Western states that squatters be allowed to preempt lands. Pioneers often settled on public lands before th...

Ust-Ordyn-Buryat Autonomous Area

(Encyclopedia)Ust-Ordyn-Buryat Autonomous Area, former administrative division, 9,000 sq mi (24,000 sq km), S Siberian Russia, in the Irkutsk region. Formed in 1937, it stretched from the Baykal Mts. to the Angara ...

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