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.