Definition of locust beetle in English:

locust beetle

noun

  • 1A locust or cicada, or other insect thought to resemble one of these (now rare).

  • 2Any of several beetles associated with locust trees; especially (US) an orange and black leaf beetle, Odontota dorsalis, the larvae of which are leafminers of the black locust, Robinia pseudoacacia.

Origin

Mid 18th century. Originally after post-classical Latin scarabaeus locusta or its model Dutch sprinkhaantorre.