Dictionary
Rock'y Moun'tain lo'cust
a migratory locust,
Melanoplus spretus, that occurs in North America, esp. the Great Plains, where swarms cause great damage to crops and other vegetation. Also called
Rock'y Moun'tain grass'hopper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.